opt: remove useless code

src/mango.c

@@ -1276,8 +1276,6 @@ void applyrules(Client *c) {
 			newtags |= r->tags;
 		} else if (parent) {
 			newtags = parent->tags;
-		} else {
-			newtags |= 0;
 		}
 
 		// set monitor of client