Remove unused code

ios/chrome/browser/ui/content_suggestions/cells/content_suggestions_favicon_item.mm

Index: ios/chrome/browser/ui/content_suggestions/cells/content_suggestions_favicon_item.mm
diff --git a/ios/chrome/browser/ui/content_suggestions/cells/content_suggestions_favicon_item.mm b/ios/chrome/browser/ui/content_suggestions/cells/content_suggestions_favicon_item.mm
deleted file mode 100644
index 668c82f1858d99395ee3ac5285847e923e3258e6..0000000000000000000000000000000000000000
--- a/ios/chrome/browser/ui/content_suggestions/cells/content_suggestions_favicon_item.mm
+++ /dev/null
@@ -1,142 +0,0 @@
-// 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/cells/content_suggestions_favicon_item.h"
-
-#import <UIKit/UIKit.h>
-
-#include "base/logging.h"
-#import "ios/chrome/browser/ui/content_suggestions/cells/content_suggestions_favicon_internal_cell.h"
-#import "ios/chrome/browser/ui/uikit_ui_util.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-// Space between two cells in the internal collection view.
-const CGFloat kInternalCellSpacing = 40;
-// Width of the cells in the internal collection view.
-const CGFloat kInternalCellWidth = 70;
-// Height of the cells in the internal collection view.
-const CGFloat kInternalCellHeight = 120;
-// Leading inset of the internal collection view.
-const CGFloat kInternalLeadingSpacing = 16;
-}  // namespace
-
-#pragma mark - SugggestionsFaviconItem
-
-// The item is the data source of the inner collection view.
-@interface ContentSuggestionsFaviconItem ()<UICollectionViewDataSource> {
-  NSMutableArray<NSString*>* _faviconTitles;
-  NSMutableArray<UIImage*>* _faviconImages;
-}
-
-@end
-
-@implementation ContentSuggestionsFaviconItem
-
-@synthesize delegate = _delegate;
-
-- (instancetype)initWithType:(NSInteger)type {
-  self = [super initWithType:type];
-  if (self) {
-    self.cellClass = [ContentSuggestionsFaviconCell class];
-    _faviconTitles = [NSMutableArray array];
-    _faviconImages = [NSMutableArray array];
-  }
-  return self;
-}
-
-- (void)addFavicon:(UIImage*)favicon withTitle:(NSString*)title {
-  if (!favicon || !title)
-    return;
-
-  [_faviconImages addObject:favicon];
-  [_faviconTitles addObject:title];
-}
-
-#pragma mark - UICollectionViewDataSource
-
-- (UICollectionViewCell*)collectionView:(UICollectionView*)collectionView
-                 cellForItemAtIndexPath:(NSIndexPath*)indexPath {
-  ContentSuggestionsFaviconInternalCell* cell = [collectionView
-      dequeueReusableCellWithReuseIdentifier:
-          [ContentSuggestionsFaviconInternalCell reuseIdentifier]
-                                forIndexPath:indexPath];
-  cell.faviconView.image = [_faviconImages objectAtIndex:indexPath.item];
-  cell.titleLabel.text = [_faviconTitles objectAtIndex:indexPath.item];
-  return cell;
-}
-
-- (NSInteger)collectionView:(UICollectionView*)collectionView
-     numberOfItemsInSection:(NSInteger)section {
-  DCHECK([_faviconImages count] == [_faviconTitles count]);
-  return [_faviconImages count];
-}
-
-#pragma mark - CollectionViewItem
-
-- (void)configureCell:(ContentSuggestionsFaviconCell*)cell {
-  [super configureCell:cell];
-  cell.collectionView.dataSource = self;
-  cell.delegate = self.delegate;
-}
-
-@end
-
-#pragma mark - ContentSuggestionsFaviconCell
-
-// The cell is the delegate of the inner collection view.
-@interface ContentSuggestionsFaviconCell ()<UICollectionViewDelegate>
-
-@end
-
-@implementation ContentSuggestionsFaviconCell
-
-@synthesize collectionView = _collectionView;
-@synthesize delegate = _delegate;
-
-- (instancetype)initWithFrame:(CGRect)frame {
-  self = [super initWithFrame:frame];
-  if (self) {
-    UICollectionViewFlowLayout* layout =
-        [[UICollectionViewFlowLayout alloc] init];
-    layout.scrollDirection = UICollectionViewScrollDirectionHorizontal;
-    layout.minimumInteritemSpacing = kInternalCellSpacing;
-    layout.itemSize = CGSizeMake(kInternalCellWidth, kInternalCellHeight);
-    layout.sectionInset = UIEdgeInsetsMake(0, kInternalLeadingSpacing, 0, 0);
-
-    _collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero
-                                         collectionViewLayout:layout];
-    [_collectionView registerClass:[ContentSuggestionsFaviconInternalCell class]
-        forCellWithReuseIdentifier:[ContentSuggestionsFaviconInternalCell
-                                       reuseIdentifier]];
-    _collectionView.backgroundColor = [UIColor clearColor];
-    _collectionView.translatesAutoresizingMaskIntoConstraints = NO;
-
-    _collectionView.delegate = self;
-
-    [self.contentView addSubview:_collectionView];
-    AddSameSizeConstraint(_collectionView, self.contentView);
-    [_collectionView.heightAnchor constraintEqualToConstant:kInternalCellHeight]
-        .active = YES;
-  }
-  return self;
-}
-
-- (void)prepareForReuse {
-  [super prepareForReuse];
-  self.collectionView.dataSource = nil;
-  self.delegate = nil;
-}
-
-#pragma mark - UICollectionViewDelegate
-
-- (void)collectionView:(UICollectionView*)collectionView
-    didSelectItemAtIndexPath:(NSIndexPath*)indexPath {
-  [self.delegate openFaviconAtIndexPath:indexPath];
-}
-
-@end