Basic controller deletion support

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@1491 0778d3d1-df1d-0410-868b-ea421aaaa00d

include/controller.h

@@ -149,9 +149,6 @@ signals:
 	// The value changed while the mixer isn't running (i.e: MIDI CC)
 	void valueChanged( void );
 
-	// Allow all attached models to unlink
-	void destroying( void );
-
 	friend class controllerDialog;
 
 } ;