a99694cca8
This patch refactors gst_wl_display_callback_destroy() to use the recently introduced gst_wl_display_object_destroy() helper. Previously, the function manually handled wl_callback destruction with explicit lock/unlock calls and direct invocation of wl_callback_destroy(). Switching to gst_wl_display_object_destroy() unifies the destruction process across similar objects, reducing code duplication and potential errors. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8242>