Remove the PaintWindow optimization.

This was an attempt to avoid scratch gc creation and validation for paintwin
because that was expensive.  This is not the case in current servers, and the
danger of failure to implement it correctly (as seen in all previous
implementations) is high enough to justify removing it.  No performance
difference detected with x11perf -create -move -resize -circulate on Xvfb.
Leave the screen hooks for PaintWindow* in for now to avoid ABI change.

hw/xfree86/xf1bpp/Makefile.am

@@ -45,7 +45,6 @@ libxf1bppmfb_a_SOURCES = \
         mfbline.c \
         mfbmisc.c \
         mfbpixmap.c \
-        mfbpntwin.c \
         mfbpolypnt.c \
         mfbpushpxl.c \
         mfbscrclse.c \

hw/xfree86/xf1bpp/mfbmap.h

@@ -61,7 +61,6 @@
 #define mfbListInstalledColormaps  xf1bppListInstalledColormaps
 #define mfbMapWindow  xf1bppMapWindow
 #define mfbPadPixmap  xf1bppPadPixmap
-#define mfbPaintWindow  xf1bppPaintWindow
 #define mfbPixmapToRegion  xf1bppPixmapToRegion
 #define mfbPixmapToRegionWeak xf1bppPixmapToRegionWeak
 #define mfbPolyFillArcSolid  xf1bppPolyFillArcSolid

hw/xfree86/xf1bpp/mfbunmap.h

@@ -53,7 +53,6 @@
 #undef mfbListInstalledColormaps
 #undef mfbMapWindow
 #undef mfbPadPixmap
-#undef mfbPaintWindow
 #undef mfbPixmapToRegion
 #undef mfbPixmapToRegionWeak
 #undef mfbPolyFillArcSolid