Detaches the cross-tab storage listener registered by setupNotify
and clears the retained unsubscribe handle, allowing a subsequent
setupNotify() to re-register (e.g. after a storage swap, in tests, or
during HMR). No-op when notify was never set up.
Detaches the cross-tab storage listener registered by setupNotify and clears the retained unsubscribe handle, allowing a subsequent
setupNotify()to re-register (e.g. after a storage swap, in tests, or during HMR). No-op when notify was never set up.