backends: Make MetaHwCursorInhibitor less about sprites

Remove the sprite argument from the vfunc, it's used in no implementations
and conceptually gets a bit in the middle.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1403>

src/backends/native/meta-cursor-renderer-native.c

@@ -880,8 +880,7 @@ should_have_hw_cursor (MetaCursorRenderer *renderer,
   if (!cursor_sprite)
     return FALSE;
 
-  if (meta_cursor_renderer_is_hw_cursors_inhibited (renderer,
-                                                    cursor_sprite))
+  if (meta_cursor_renderer_is_hw_cursors_inhibited (renderer))
     return FALSE;
 
   for (l = gpus; l; l = l->next)