parameters: (username)
docstring: Remove a user from all notifications.
  
      :param username: The user to remove.
      :type username: str
      :returns: dict with keys "success" (boolean) and "message" (str) if failed.
docstring_summary: Remove a user from all notifications.
docstring_tokens: Remove a user from all notifications .
function: def remove_user_notifications(username):
      """
      Remove a user from all notifications.
  
      :param username: The user to remove.
      :type username: str
      :returns: dict with keys "success" (boolean) and "message" (str) if failed.
      """
  
      Notification.objects(users=username).update_one(pull__users=username)
function_tokens: def remove_user_notifications ( username ) : Notification . objects ( users = username ) . update_one ( pull__users = username )