Cleanup ContentSuggestions cells

ios/chrome/browser/ui/content_suggestions/content_suggestions_favicon_item.h

-// 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.
-
-#ifndef IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_FAVICON_ITEM_H_
-#define IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_FAVICON_ITEM_H_
-
-#import "ios/chrome/browser/ui/collection_view/cells/collection_view_item.h"
-#import "ios/third_party/material_components_ios/src/components/CollectionCells/src/MaterialCollectionCells.h"
-
-// Delegate for the ContentSuggestionsFaviconCell, handling the interaction with
-// the inner collection view.
-@protocol ContentSuggestionsFaviconCellDelegate
-
-// Opens the favicon associated with the |indexPath| of the internal cell.
-- (void)openFaviconAtIndexPath:(nonnull NSIndexPath*)innerIndexPath;
-
-@end
-
-// Item for a cell containing favicons in the suggestions. The favicons are
-// presented in an inner collection view contained in the cell associated with
-// this item. The collection view scrolls horizontally.
-@interface ContentSuggestionsFaviconItem : CollectionViewItem
-
-@property(nonatomic, weak, nullable) id<ContentSuggestionsFaviconCellDelegate>
-    delegate;
-
-// Adds a favicon with a |favicon| image and a |title| to this item.
-- (void)addFavicon:(nonnull UIImage*)favicon withTitle:(nonnull NSString*)title;
-
-@end
-
-// The corresponding cell of a favicon item.
-@interface ContentSuggestionsFaviconCell : MDCCollectionViewCell
-
-// The inner collection view, used to display the favicons.
-@property(nonatomic, strong, nullable) UICollectionView* collectionView;
-
-@property(nonatomic, weak, nullable) id<ContentSuggestionsFaviconCellDelegate>
-    delegate;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_FAVICON_ITEM_H_