Clean-up unused imports

Motivation:

the build doesnt seem to enforce this, so they piled up

Modifications:

removed unused import lines

Result:

less unused imports

Signed-off-by: radai-rosenblatt <radai.rosenblatt@gmail.com>

buffer/src/test/java/io/netty/buffer/SlicedByteBufTest.java

@@ -19,7 +19,6 @@ import io.netty.util.internal.ThreadLocalRandom;
 import org.junit.Test;
 
 import java.io.IOException;
-import java.util.Random;
 
 import static org.junit.Assert.*;
 

codec-dns/src/main/java/io/netty/handler/codec/dns/DatagramDnsQueryDecoder.java

@@ -23,7 +23,6 @@ import io.netty.handler.codec.CorruptedFrameException;
 import io.netty.handler.codec.MessageToMessageDecoder;
 import io.netty.util.internal.UnstableApi;
 
-import java.net.InetSocketAddress;
 import java.util.List;
 
 import static io.netty.util.internal.ObjectUtil.checkNotNull;

codec-dns/src/main/java/io/netty/handler/codec/dns/DatagramDnsResponseDecoder.java

@@ -23,7 +23,6 @@ import io.netty.handler.codec.CorruptedFrameException;
 import io.netty.handler.codec.MessageToMessageDecoder;
 import io.netty.util.internal.UnstableApi;
 
-import java.net.InetSocketAddress;
 import java.util.List;
 
 import static io.netty.util.internal.ObjectUtil.checkNotNull;

codec-http/src/main/java/io/netty/handler/codec/http/HttpRequestEncoder.java

@@ -20,8 +20,6 @@ import io.netty.buffer.ByteBufUtil;
 import io.netty.util.AsciiString;
 import io.netty.util.CharsetUtil;
 
-import static io.netty.handler.codec.http.HttpConstants.CR;
-import static io.netty.handler.codec.http.HttpConstants.LF;
 import static io.netty.handler.codec.http.HttpConstants.SP;
 
 /**

codec-http2/src/main/java/io/netty/handler/codec/http2/DefaultHttp2HeadersDecoder.java

@@ -19,8 +19,6 @@ import io.netty.buffer.ByteBuf;
 import io.netty.handler.codec.http2.internal.hpack.Decoder;
 import io.netty.util.internal.UnstableApi;
 
-import java.io.IOException;
-
 import static io.netty.handler.codec.http2.Http2CodecUtil.DEFAULT_HEADER_TABLE_SIZE;
 import static io.netty.handler.codec.http2.Http2CodecUtil.DEFAULT_MAX_HEADER_SIZE;
 import static io.netty.handler.codec.http2.Http2CodecUtil.MAX_HEADER_TABLE_SIZE;

codec-http2/src/main/java/io/netty/handler/codec/http2/Http2ServerUpgradeCodec.java

@@ -20,7 +20,6 @@ import io.netty.channel.ChannelHandler;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.base64.Base64;
 import io.netty.handler.codec.http.FullHttpRequest;
-import io.netty.handler.codec.http.FullHttpResponse;
 import io.netty.handler.codec.http.HttpHeaders;
 import io.netty.handler.codec.http.HttpServerUpgradeHandler;
 import io.netty.util.CharsetUtil;

codec-http2/src/main/java/io/netty/handler/codec/http2/internal/hpack/Decoder.java

@@ -39,7 +39,6 @@ import io.netty.util.AsciiString;
 
 import static io.netty.handler.codec.http2.Http2Error.COMPRESSION_ERROR;
 import static io.netty.handler.codec.http2.Http2Error.ENHANCE_YOUR_CALM;
-import static io.netty.handler.codec.http2.Http2Error.valueOf;
 import static io.netty.handler.codec.http2.Http2Exception.connectionError;
 import static io.netty.util.AsciiString.EMPTY_STRING;
 import static io.netty.util.internal.ThrowableUtil.unknownStackTrace;

codec-http2/src/test/java/io/netty/handler/codec/http2/Http2ConnectionHandlerTest.java

@@ -53,7 +53,6 @@ import static io.netty.handler.codec.http2.Http2TestUtil.newVoidPromise;
 import static io.netty.util.CharsetUtil.UTF_8;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.anyBoolean;

codec-http2/src/test/java/io/netty/handler/codec/http2/Http2FrameCodecTest.java

@@ -50,7 +50,6 @@ import java.util.Queue;
 import static io.netty.util.ReferenceCountUtil.releaseLater;
 import static org.hamcrest.Matchers.instanceOf;
 import static org.junit.Assert.*;
-import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.*;
 
 /**

codec-http2/src/test/java/io/netty/handler/codec/http2/Http2SettingsTest.java

@@ -20,7 +20,6 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 
-import io.netty.handler.codec.http.HttpUtil;
 import org.junit.Before;
 import org.junit.Test;
 

codec-memcache/src/main/java/io/netty/handler/codec/memcache/binary/AbstractBinaryMemcacheEncoder.java

@@ -19,7 +19,6 @@ import io.netty.buffer.ByteBuf;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.MessageToByteEncoder;
 import io.netty.handler.codec.memcache.AbstractMemcacheObjectEncoder;
-import io.netty.util.CharsetUtil;
 import io.netty.util.internal.UnstableApi;
 
 /**

codec/src/main/java/io/netty/handler/codec/DefaultHeaders.java

@@ -16,7 +16,6 @@ package io.netty.handler.codec;
 
 import io.netty.util.HashingStrategy;
 import io.netty.util.concurrent.FastThreadLocal;
-import io.netty.util.internal.SystemPropertyUtil;
 
 import java.text.DateFormat;
 import java.text.ParseException;

codec/src/test/java/io/netty/handler/codec/base64/Base64Test.java

@@ -22,7 +22,6 @@ import org.junit.Test;
 
 
 import java.io.ByteArrayInputStream;
-import java.nio.charset.Charset;
 import java.security.cert.CertificateFactory;
 import java.security.cert.X509Certificate;
 

common/src/main/java/io/netty/util/concurrent/EventExecutor.java

@@ -15,8 +15,6 @@
  */
 package io.netty.util.concurrent;
 
-import java.util.Set;
-
 /**
  * The {@link EventExecutor} is a special {@link EventExecutorGroup} which comes
  * with some handy methods to see if a {@link Thread} is executed in a event loop.

common/src/main/java/io/netty/util/concurrent/EventExecutorGroup.java

@@ -17,7 +17,6 @@ package io.netty.util.concurrent;
 
 import java.util.Iterator;
 import java.util.List;
-import java.util.Set;
 import java.util.concurrent.Callable;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;

common/src/test/java/io/netty/util/NetUtilTest.java

@@ -17,7 +17,6 @@ package io.netty.util;
 
 import org.junit.Test;
 
-import java.net.Inet6Address;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
 import java.util.HashMap;

handler/src/main/java/io/netty/handler/flow/FlowControlHandler.java

@@ -18,7 +18,6 @@ package io.netty.handler.flow;
 import java.util.ArrayDeque;
 import java.util.Queue;
 
-import io.netty.channel.Channel;
 import io.netty.channel.ChannelConfig;
 import io.netty.channel.ChannelDuplexHandler;
 import io.netty.channel.ChannelHandler;

handler/src/main/java/io/netty/handler/ssl/JdkSslContext.java

@@ -17,7 +17,6 @@
 package io.netty.handler.ssl;
 
 import io.netty.buffer.ByteBufAllocator;
-import io.netty.util.internal.EmptyArrays;
 import io.netty.util.internal.logging.InternalLogger;
 import io.netty.util.internal.logging.InternalLoggerFactory;
 
@@ -30,14 +29,11 @@ import java.io.File;
 import java.io.IOException;
 import java.security.InvalidAlgorithmParameterException;
 import java.security.KeyException;
-import java.security.KeyStore;
 import java.security.KeyStoreException;
 import java.security.NoSuchAlgorithmException;
-import java.security.PrivateKey;
 import java.security.Security;
 import java.security.UnrecoverableKeyException;
 import java.security.cert.CertificateException;
-import java.security.cert.X509Certificate;
 import java.security.spec.InvalidKeySpecException;
 import java.util.ArrayList;
 import java.util.Arrays;

handler/src/main/java/io/netty/handler/ssl/OpenSslEngine.java

@@ -19,8 +19,6 @@ import io.netty.buffer.ByteBufAllocator;
 
 import javax.net.ssl.SSLEngine;
 
-import static io.netty.util.ReferenceCountUtil.safeRelease;
-
 /**
  * Implements a {@link SSLEngine} using
  * <a href="https://www.openssl.org/docs/crypto/BIO_s_bio.html#EXAMPLE">OpenSSL BIO abstractions</a>.

handler/src/main/java/io/netty/handler/ssl/SniHandler.java

@@ -20,8 +20,6 @@ import java.net.SocketAddress;
 import java.util.List;
 import java.util.Locale;
 
-import javax.net.ssl.SSLEngine;
-
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.ByteBufUtil;
 import io.netty.channel.ChannelHandlerContext;

handler/src/test/java/io/netty/handler/flow/FlowControlHandlerTest.java

@@ -40,16 +40,10 @@ import org.junit.Test;
 
 import java.net.SocketAddress;
 import java.util.List;
-import java.util.Queue;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.Exchanger;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicInteger;
-import java.util.concurrent.atomic.AtomicReference;
 
 import static java.util.concurrent.TimeUnit.*;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 

handler/src/test/java/io/netty/handler/ssl/SslHandlerTest.java

@@ -19,10 +19,7 @@ package io.netty.handler.ssl;
 import static org.hamcrest.CoreMatchers.instanceOf;
 import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.CoreMatchers.nullValue;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertThat;
 import static org.junit.Assert.*;
-import static org.junit.Assert.fail;
 import static org.junit.Assume.assumeTrue;
 
 import javax.net.ssl.SSLContext;

microbench/src/main/java/io/netty/microbench/http2/internal/hpack/HeadersSize.java

@@ -34,7 +34,6 @@ package io.netty.microbench.http2.internal.hpack;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 
-import java.io.ByteArrayOutputStream;
 import java.util.List;
 
 /**

testsuite/src/main/java/io/netty/testsuite/transport/socket/SocketAutoReadTest.java

@@ -30,17 +30,12 @@ import io.netty.channel.RecvByteBufAllocator;
 import io.netty.util.ReferenceCountUtil;
 import org.junit.Test;
 
-import java.io.IOException;
-import java.util.Random;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
-import java.util.concurrent.atomic.AtomicReference;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
 public class SocketAutoReadTest extends AbstractSocketTest {
     @Test

transport-udt/src/main/java/io/netty/channel/udt/nio/NioUdtByteConnectorChannel.java

@@ -21,7 +21,6 @@ import io.netty.buffer.ByteBuf;
 import io.netty.channel.Channel;
 import io.netty.channel.ChannelException;
 import io.netty.channel.ChannelFuture;
-import io.netty.channel.ChannelMetadata;
 import io.netty.channel.FileRegion;
 import io.netty.channel.RecvByteBufAllocator;
 import io.netty.channel.nio.AbstractNioByteChannel;

transport/src/main/java/io/netty/channel/Channel.java

@@ -22,10 +22,7 @@ import io.netty.channel.socket.DatagramPacket;
 import io.netty.channel.socket.ServerSocketChannel;
 import io.netty.channel.socket.SocketChannel;
 import io.netty.util.AttributeMap;
-import io.netty.util.concurrent.EventExecutor;
-import io.netty.util.concurrent.FutureListener;
 
-import java.net.ConnectException;
 import java.net.InetSocketAddress;
 import java.net.SocketAddress;
 

transport/src/main/java/io/netty/channel/socket/nio/NioSocketChannel.java

@@ -19,7 +19,6 @@ import io.netty.buffer.ByteBuf;
 import io.netty.channel.Channel;
 import io.netty.channel.ChannelException;
 import io.netty.channel.ChannelFuture;
-import io.netty.channel.ChannelMetadata;
 import io.netty.channel.ChannelOutboundBuffer;
 import io.netty.channel.ChannelPromise;
 import io.netty.channel.EventLoop;

transport/src/test/java/io/netty/channel/pool/AbstractChannelPoolMapTest.java

@@ -17,7 +17,6 @@ package io.netty.channel.pool;
 
 import io.netty.bootstrap.Bootstrap;
 import io.netty.channel.Channel;
-import io.netty.channel.ChannelException;
 import io.netty.channel.EventLoop;
 import io.netty.channel.EventLoopGroup;
 import io.netty.channel.local.LocalAddress;