Remove unused code

ios/chrome/browser/ui/content_suggestions/identifier/content_suggestions_section_information.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_IDENTIFIER_CONTENT_SUGGESTIONS_SECTION_INFORMATION_H_
 #define IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_IDENTIFIER_CONTENT_SUGGESTIONS_SECTION_INFORMATION_H_
 
 #import <Foundation/Foundation.h>
 
 // Layout for the section and its items.
 typedef NS_ENUM(NSInteger, ContentSuggestionsSectionLayout) {
   // Follows the card layout.
   ContentSuggestionsSectionLayoutCard,
   // No specific layout.
   ContentSuggestionsSectionLayoutCustom,
 };
 
 // This enum is used for ordering the sections and as ID for the section. Make
 // all sections in the same collection have different ID.
 // When adding a new kind of suggestions, add a new corresponding section. The
 // ordering is not persisted between launch, reordering is possible.
 typedef NS_ENUM(NSInteger, ContentSuggestionsSectionID) {
-  ContentSuggestionsSectionBookmarks = 0,
-  ContentSuggestionsSectionArticles = 1,
-  ContentSuggestionsSectionReadingList = 2,
+  ContentSuggestionsSectionArticles = 0,
+  ContentSuggestionsSectionReadingList,
 
   // Do not use this. It will trigger a DCHECK.
   // Do not add value after this one.
   ContentSuggestionsSectionUnknown
 };
 
 // Contains the information needed to display the section.
 @interface ContentSuggestionsSectionInformation : NSObject
 
 - (instancetype)initWithSectionID:(ContentSuggestionsSectionID)sectionID
@@ skipping 11 matching lines @@
 // Text to be displayed when the section is empty.
 @property(nonatomic, copy) NSString* emptyText;
 // If the section should be shown when empty at loading. If the section becomes
 // empty because the user dismissed suggestions, the |emptyText| must be shown
 // in both cases.
 @property(nonatomic, assign) BOOL showIfEmpty;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_IDENTIFIER_CONTENT_SUGGESTIONS_SECTION_INFORMATION_H_