Remove unused pointer to nothing.

gtk2_ardour/location_ui.h

@@ -38,7 +38,6 @@
 #include "audio_clock.h"
 
 namespace ARDOUR {
-	class LocationStack;
 	class Location;
 }
 
@@ -163,7 +162,6 @@ class LocationUI : public Gtk::HBox, public ARDOUR::SessionHandlePtr
 	XMLNode & get_state () const;
 
   private:
-	ARDOUR::LocationStack* locations;
 	/** set to the location that has just been created with the LocationUI `add' button
 	    (if Config->get_name_new_markers() is true); if it is non-0, the name entry of
 	    the location is given the focus by location_added().