wined3d: Get rid of the unused palette9 wined3d_surface field.

dlls/wined3d/surface.c

@@ -117,8 +117,6 @@ static void surface_cleanup(struct wined3d_surface *surface)
         overlay->overlay_dest = NULL;
     }
 
-    HeapFree(GetProcessHeap(), 0, surface->palette9);
-
     resource_cleanup(&surface->resource);
 }
 

dlls/wined3d/wined3d_private.h

@@ -2012,7 +2012,6 @@ struct wined3d_surface
     const struct wined3d_surface_ops *surface_ops;
     struct wined3d_subresource_container container;
     struct wined3d_palette *palette; /* D3D7 style palette handling */
-    PALETTEENTRY              *palette9; /* D3D8/9 style palette handling */
     DWORD draw_binding;
 
     DWORD flags;