kike: get rid of "Reason omitted"

It was rather distracting and confusing.

kike.c

@@ -921,7 +921,7 @@ client_kill (struct client *c, const char *reason)
 	client_cancel_timers (c);
 
 	print_debug ("closed connection to %s (%s)",
-		c->address, reason ? reason : "Reason omitted");
+		c->address, reason ? reason : "");
 
 	c->socket_fd = -1;
 	client_free (c);