Remove an incorrect override of CollectionNotifier::release_data()
Remove an incorrect override of CollectionNotifier::release_data()

Subscription::Notifier used to not have anything to release, but changes in how
notifiers are attached to transactions means it now does, and failing to
release the transaction leads to crashes.

realm/realm-core,realm/realm-core,realm/realm-object-store,realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-object-store,realm/realm-core,realm/realm-object-store,realm/realm-core