os: Don't re-declare ConnectionInputPtr and ConnectionOutputPtr

They're declared in osdep.h, so don't redeclare them in io.c as
well. Keeps the compiler happier.

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>

os/io.c

@@ -90,14 +90,14 @@ typedef struct _connectionInput {
     int lenLastReq;
     int size;
     unsigned int ignoreBytes;   /* bytes to ignore before the next request */
-} ConnectionInput, *ConnectionInputPtr;
+} ConnectionInput;
 
 typedef struct _connectionOutput {
     struct _connectionOutput *next;
     unsigned char *buf;
     int size;
     int count;
-} ConnectionOutput, *ConnectionOutputPtr;
+} ConnectionOutput;
 
 static ConnectionInputPtr AllocateInputBuffer(void);
 static ConnectionOutputPtr AllocateOutputBuffer(void);