HIL cleanup

src/drivers/hil/hil.cpp

 /****************************************************************************
  *
- *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
+ *   Copyright (c) 2012-2014 PX4 Development Team. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -193,9 +193,10 @@ HIL::~HIL()
 		} while (_task != -1);
 	}
 
-	/* clean up the alternate device node */
-	if (_primary_pwm_device)
-		unregister_driver(PWM_OUTPUT_DEVICE_PATH);
+	// XXX already claimed with CDEV
+	// /* clean up the alternate device node */
+	// if (_primary_pwm_device)
+	// 	unregister_driver(PWM_OUTPUT_DEVICE_PATH);
 
 	g_hil = nullptr;
 }