removeChannel abstract method
Removes a notification channel with the specified channelKey.
The channelKey parameter is a String that represents the unique key of
the channel to remove.
This method can be used to remove notification channels that are no longer needed by the app. Note that removing a channel also removes all notifications that were associated with the channel. If there are no notifications associated with the channel, the channel will be removed immediately. If there are notifications associated with the channel, they will be cancelled before the channel is removed.
This method returns a Future that resolves to a boolean value indicating
whether the channel was removed successfully. If the channel was removed
successfully, the value will be true. If the channel was not found or
could not be removed, the value will be false.
Implementation
Future<bool> removeChannel(String channelKey);