[mutter] cogl: Remove unused OFFSCREEN_BLIT feature flag

[Jonas Ã…dahl <jadahl src gnome org>]

commit c08a24bb40ad7aa7746e86251c9dbe6c264b4d7c
Author: Pekka Paalanen <pekka paalanen collabora com>
Date:   Fri Apr 26 12:23:18 2019 +0300

    cogl: Remove unused OFFSCREEN_BLIT feature flag
    
    This named constant is never used anywhere.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/615

 cogl/cogl/cogl-types.h | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/cogl/cogl/cogl-types.h b/cogl/cogl/cogl-types.h
index 71e4fd53c..718f4c4b5 100644
--- a/cogl/cogl/cogl-types.h
+++ b/cogl/cogl/cogl-types.h
@@ -153,7 +153,6 @@ typedef struct _CoglTextureVertex       CoglTextureVertex;
  * @COGL_FEATURE_TEXTURE_READ_PIXELS: glReadPixels() support
  * @COGL_FEATURE_OFFSCREEN: FBO support
  * @COGL_FEATURE_OFFSCREEN_MULTISAMPLE: Multisample support on FBOs
- * @COGL_FEATURE_OFFSCREEN_BLIT: Blit support on FBOs
  * @COGL_FEATURE_FOUR_CLIP_PLANES: At least 4 clip planes available
  * @COGL_FEATURE_STENCIL_BUFFER: Stencil buffer support
  * @COGL_FEATURE_VBOS: VBO support
@@ -181,7 +180,6 @@ typedef enum
   COGL_FEATURE_TEXTURE_READ_PIXELS    = (1 << 4),
   COGL_FEATURE_OFFSCREEN              = (1 << 6),
   COGL_FEATURE_OFFSCREEN_MULTISAMPLE  = (1 << 7),
-  COGL_FEATURE_OFFSCREEN_BLIT         = (1 << 8),
   COGL_FEATURE_FOUR_CLIP_PLANES       = (1 << 9),
   COGL_FEATURE_STENCIL_BUFFER         = (1 << 10),
   COGL_FEATURE_VBOS                  = (1 << 11),