Compositor: Followup to previous stats commit

No need to mark tree for localization, it was never done and
it all just worked. We can save some CPU ticks by skipping doing
this.

source/blender/editors/space_node/node_edit.c

@@ -162,13 +162,12 @@ static int compo_breakjob(void *cjv)
 	        );
 }
 
-/* called by compo, wmJob sends notifier, old compositor system only */
+/* called by compo, wmJob sends notifier */
 static void compo_statsdrawjob(void *cjv, char *UNUSED(str))
 {
 	CompoJob *cj = cjv;
 	
 	*(cj->do_update) = true;
-	cj->need_sync = true;
 }
 
 /* called by compo, wmJob sends notifier */