Remove ios/testing/earl_grey/wait_util.

ios/testing/earl_grey/wait_util.mm

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ios/testing/earl_grey/wait_util.h"
-
-#import <EarlGrey/EarlGrey.h>
-
-#include "base/test/ios/wait_util.h"
-#include "ios/testing/wait_util.h"
-
-namespace testing {
-
-void WaitUntilCondition(NSTimeInterval timeout,
-                        NSString* timeoutDescription,
-                        bool (^condition)(void)) {
-  GREYAssert(testing::WaitUntilConditionOrTimeout(timeout, condition),
-             timeoutDescription);
-}
-
-void WaitUntilCondition(NSTimeInterval timeout, bool (^condition)(void)) {
-  WaitUntilCondition(timeout, @"Timeout waiting for condition.", condition);
-}
-
-}  // namespace testing