reset_type_associations
Description:
Removes all changes to the type associations done by [method@Gio.
AppInfo.set_as_default_for_type], [method@Gio.AppInfo.set_as_default_for_extension], [method@Gio.AppInfo.add_supports_type] or [ method@Gio.AppInfo.remove_supports_type].
Parameters:
| content_type |
a content type |