Delete a controller.
Handles both single-file and package-style controllers.
Args: controller_type: Type of the controller controller_name: Name of the controller to delete
Returns: Success message when controller is deleted
Raises: HTTPException: 404 if controller not found
Basic authentication header of the form Basic <encoded-value>, where <encoded-value> is the base64-encoded string username:password.
Types of controllers available
directional_trading, market_making, generic Successful Response