[mutter] cursor-sprite: Don't NULL check realize_texture() vfunc

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit e1f25b72449a9910f0803a47e4d4102e6d29f0ef
Author: Jonas Ådahl <jadahl gmail com>
Date:   Wed Jul 29 11:09:51 2020 +0200

    cursor-sprite: Don't NULL check realize_texture() vfunc
    
    All non-abstract MetaCursorSprite type implementations implement this
    function, so no need to NULL check it.
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1391

 src/backends/meta-cursor.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)
---
diff --git a/src/backends/meta-cursor.c b/src/backends/meta-cursor.c
index f6b2077626..874593d5ad 100644
--- a/src/backends/meta-cursor.c
+++ b/src/backends/meta-cursor.c
@@ -189,10 +189,7 @@ meta_cursor_sprite_prepare_at (MetaCursorSprite *sprite,
 void
 meta_cursor_sprite_realize_texture (MetaCursorSprite *sprite)
 {
-  MetaCursorSpriteClass *klass = META_CURSOR_SPRITE_GET_CLASS (sprite);
-
-  if (klass->realize_texture)
-    klass->realize_texture (sprite);
+  META_CURSOR_SPRITE_GET_CLASS (sprite)->realize_texture (sprite);
 }
 
 static void