Remove any matching 'beforeunload', 'unload' and 'pagehide' events that may have been added via addEventListener,
addEventListeners, addPageUnloadEventListener or addPageHideEventListener.
Parameters
listener: any
The specific event callback to to be removed
OptionalevtNamespace: string | string[]
[Optional] Namespace(s) uniquely identified and removed based on this namespace.
Returns void
true - when at least one of the events was registered otherwise false
Remove any matching 'beforeunload', 'unload' and 'pagehide' events that may have been added via addEventListener, addEventListeners, addPageUnloadEventListener or addPageHideEventListener.