io_uring/io-wq: remove io_wq_for_each_worker() return value

The only use of this helper is to iterate all of the workers, and
hence all callers will pass in a func that always returns false to do
that. As none of the callers use the return value, get rid of it.

Reviewed-by: Gabriel Krisman Bertazi <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

io_uring/io-wq.c

···
 	return ret;
 }
 
-static bool io_wq_for_each_worker(struct io_wq *wq,
+static void io_wq_for_each_worker(struct io_wq *wq,
 				  bool (*func)(struct io_worker *, void *),
 				  void *data)
 {
-	for (int i = 0; i < IO_WQ_ACCT_NR; i++) {
+	for (int i = 0; i < IO_WQ_ACCT_NR; i++)
 		if (io_acct_for_each_worker(&wq->acct[i], func, data))
-			return true;
-	}
-
-	return false;
+			break;
 }
 
 static bool io_wq_worker_wake(struct io_worker *worker, void *data)