Revert "load callbacks on init again as they did not seem to load with new call from executor"

This reverts commit cf4ed9a5.

lib/ansible/executor/task_queue_manager.py

@@ -63,8 +63,6 @@ class TaskQueueManager:
         self._stdout_callback  = stdout_callback
         self._callback_plugins = []
 
-        self.load_callbacks()
-
         # a special flag to help us exit cleanly
         self._terminated = False