Cleanup ContentSuggestions cells

ios/chrome/browser/ui/content_suggestions/content_suggestions_stack_item_unittest.mm

-// Copyright 2017 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.
-
-#import "ios/chrome/browser/ui/content_suggestions/content_suggestions_stack_item.h"
-
-#include "testing/gtest/include/gtest/gtest.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-// Tests that configureCell: set all the fields of the cell.
-TEST(ContentSuggestionsStackItemTest, CellIsConfigured) {
-  NSString* title = @"testTitle";
-  NSString* subtitle = @"testSubtitle";
-  ContentSuggestionsStackItem* item =
-      [[ContentSuggestionsStackItem alloc] initWithType:0
-                                                  title:title
-                                               subtitle:subtitle];
-  ContentSuggestionsStackCell* cell = [[[item cellClass] alloc] init];
-  EXPECT_EQ([ContentSuggestionsStackCell class], [cell class]);
-
-  [item configureCell:cell];
-  EXPECT_EQ(title, [cell.titleButton titleForState:UIControlStateNormal]);
-  EXPECT_EQ(subtitle, cell.detailTextLabel.text);
-}
-
-}  // namespace