Remove the handler specified by @handler_id from the list of functions to be executed when this object receives focus events (in or out).
the handler id of the focus handler to be removed from @component
Deprecated: If you need to track when an object gains or lose the focus, use the #AtkObject::state-change "focused" notification instead.
See Implementation
Remove the handler specified by @handler_id from the list of functions to be executed when this object receives focus events (in or out).