delete_task_async

Deletes task from online tasks service.

this and task are both reffed when this function is called, so can safely be unreffed after this function returns.

callback should call delete_entry_async.end to finish deleting task and to check for possible errors.

For more details, see delete_task, which is the synchronous version of this function, and delete_entry_async, which is the base asynchronous insertion function.

Parameters:

this	a TasksService
task	TasksTask to delete
cancellable	optional Cancellable object, or null
callback	a TaskReadyCallback to call when insertion is finished
user_data	data to pass to the callback function