[mutter] shaped-texture: Make set_opaque_region() private

[Florian Müllner <fmuellner src gnome org>]

commit bb4e87bf3578d681b17f34af5321c638120d1236
Author: Robert Mader <robert mader posteo de>
Date:   Sun Jun 28 23:43:56 2020 +0200

    shaped-texture: Make set_opaque_region() private
    
    The shell doesn't use it and I couldn't find any extensions that does
    and it probably doesn't make much sense any more these days anyway.
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1334

 src/compositor/meta-shaped-texture-private.h | 2 ++
 src/meta/meta-shaped-texture.h               | 4 ----
 2 files changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/src/compositor/meta-shaped-texture-private.h b/src/compositor/meta-shaped-texture-private.h
index c415260c0b..672f24eb7c 100644
--- a/src/compositor/meta-shaped-texture-private.h
+++ b/src/compositor/meta-shaped-texture-private.h
@@ -68,5 +68,7 @@ int meta_shaped_texture_get_height (MetaShapedTexture *stex);
 
 void meta_shaped_texture_set_clip_region (MetaShapedTexture *stex,
                                           cairo_region_t    *clip_region);
+void meta_shaped_texture_set_opaque_region (MetaShapedTexture *stex,
+                                            cairo_region_t    *opaque_region);
 
 #endif
diff --git a/src/meta/meta-shaped-texture.h b/src/meta/meta-shaped-texture.h
index e0a8207ab4..2ca0e6e61d 100644
--- a/src/meta/meta-shaped-texture.h
+++ b/src/meta/meta-shaped-texture.h
@@ -51,10 +51,6 @@ META_EXPORT
 void meta_shaped_texture_set_mask_texture (MetaShapedTexture *stex,
                                            CoglTexture       *mask_texture);
 
-META_EXPORT
-void meta_shaped_texture_set_opaque_region (MetaShapedTexture *stex,
-                                            cairo_region_t    *opaque_region);
-
 META_EXPORT
 cairo_surface_t * meta_shaped_texture_get_image (MetaShapedTexture     *stex,
                                                  cairo_rectangle_int_t *clip);