Index: gtkhid-cairo.c
===================================================================
--- gtkhid-cairo.c	(revision 11279)
+++ gtkhid-cairo.c	(revision 11280)
@@ -627,13 +627,6 @@
 	curr_drawing_mode = op;
 }
 
-//#define WHICH_GC(gc) (cur_mask == HID_MASK_CLEAR ? priv->mask_gc : (gc)->gc)
-
-static void ghid_cairo_use_mask(pcb_mask_op_t use_it)
-{
-}
-
-
 typedef struct {
 	int color_set;
 	GdkRGBA color;
@@ -1624,7 +1617,6 @@
 		hid->end_layer = ghid_cairo_end_layer_group;
 		hid->make_gc = ghid_cairo_make_gc;
 		hid->destroy_gc = ghid_cairo_destroy_gc;
-		hid->use_mask = ghid_cairo_use_mask;
 		hid->render_burst = ghid_cairo_render_burst;
 		hid->set_drawing_mode = ghid_cairo_set_drawing_mode;
 		hid->set_color = ghid_cairo_set_color;