PyGObject 3.52.0 moved OverridesProxyModule _introspection_module to __slots__, causing Segmentation Faults when accessing the field. Since _introspection_module is used to get Gst.Element but is never actually used afterward, we fix the issue by removing this part. Fixes #4314 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8653>