Remove declarations of symbols that are never defined.

These symbols were removed from the X Server, or never declared.
  One symbol that may need special attention is XkbBuildCoreState(),
that doesn't have a prototype anywhere, but is called from
xkb/xkbEvents.c:XkbFilterEvents(), and also used by the macros
XkbStateFieldFromRec() and XkbGrabStateFromRec() defined in
include/xkbstr.h.
  fb/wfbrename.h also may need some cleanup, as it makes several
"renames" of non existing symbols.

randr/randrstr.h

@@ -409,9 +409,6 @@ miRandRInit (ScreenPtr pScreen);
 Bool
 miRRGetInfo (ScreenPtr pScreen, Rotation *rotations);
 
-Bool
-miRRGetScreenInfo (ScreenPtr pScreen);
-
 Bool
 miRRCrtcSet (ScreenPtr	pScreen,
 	     RRCrtcPtr	crtc,
@@ -504,12 +501,6 @@ Bool RRScreenInit (ScreenPtr pScreen);
 Rotation
 RRGetRotation (ScreenPtr pScreen);
 
-int
-RRSetScreenConfig (ScreenPtr		pScreen,
-		   Rotation		rotation,
-		   int			rate,
-		   RRScreenSizePtr	pSize);
-
 #endif					
 
 /* rrcrtc.c */
@@ -699,9 +690,6 @@ RRModePtr
 RRModeGet (xRRModeInfo	*modeInfo,
 	   const char	*name);
 
-void
-RRModePruneUnused (ScreenPtr pScreen);
-
 /*
  * Destroy a mode.
  */