Janitor work. Remove 'defined but not used' warnings from xorg and other cosmetic.

hw/xfree86/common/xf86Events.c

@@ -125,9 +125,6 @@ extern Bool noXkbExtension;
  * This has been generalised to work with Linux and *BSD+syscons (DHD)
  */
 
-#ifdef USE_VT_SYSREQ
-static Bool VTSysreqToggle = FALSE;
-#endif /* !USE_VT_SYSREQ */
 _X_EXPORT Bool VTSwitchEnabled = TRUE;	/* Allows run-time disabling for
                                          *BSD and for avoiding VT
                                          switches when using the DRI

hw/xfree86/common/xf86Mode.c

@@ -458,7 +458,6 @@ xf86LookupMode(ScrnInfoPtr scrp, DisplayModePtr modep,
     int ModePrivFlags = 0;
     ModeStatus status = MODE_NOMODE;
     Bool allowDiv2 = (strategy & LOOKUP_CLKDIV2) != 0;
-    Bool haveBuiltin;
     int n;
     const int types[] = {
 	M_T_BUILTIN | M_T_PREFERRED,
@@ -2038,6 +2037,7 @@ xf86SetCrtcForModes(ScrnInfoPtr scrp, int adjustFlags)
 }
 
 
+#if 0
 static void
 add(char **p, char *new)
 {
@@ -2046,7 +2046,6 @@ add(char **p, char *new)
     strcat(*p, new);
 }
 
-#if 0
 _X_EXPORT void
 xf86PrintModeline(int scrnIndex,DisplayModePtr mode)
 {

hw/xfree86/common/xf86Xinput.c

@@ -84,9 +84,7 @@
 
 #include <stdarg.h>
 
-#include "osdep.h"		/* EnabledDevices */
 #include <X11/Xpoll.h>
-#include "xf86_OSproc.h"	/* sigio stuff */
 
 #include "mi.h"