softpipe: Remove unnecessary headers.

src/gallium/drivers/softpipe/sp_context.c

@@ -44,7 +44,6 @@
 #include "sp_surface.h"
 #include "sp_tile_cache.h"
 #include "sp_tex_tile_cache.h"
-#include "sp_winsys.h"
 #include "sp_query.h"
 
 

src/gallium/drivers/softpipe/sp_video_context.c

@@ -28,7 +28,6 @@
 #include "sp_video_context.h"
 #include <util/u_inlines.h>
 #include <util/u_memory.h>
-#include "softpipe/sp_winsys.h"
 #include "softpipe/sp_texture.h"
 
 static void