The name of the event, with optional namespaces or just the namespaces, such as "click", "click.mynamespace" or ".mynamespace"
The callback function that needs to be removed from the given event, when using a namespace (with or without a qualifying event) this may be null to remove all previously attached event handlers otherwise this will only remove events with this specific handler.
[Optional] Defaults to false
Removes an event handler for the specified event