Move ContentSuggestions identifiers to custom target

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

Index: ios/chrome/browser/ui/content_suggestions/content_suggestion_identifier.h
diff --git a/ios/chrome/browser/ui/content_suggestions/content_suggestion_identifier.h b/ios/chrome/browser/ui/content_suggestions/content_suggestion_identifier.h
deleted file mode 100644
index 81488804936031daa58bdd2d541e99d12209ca89..0000000000000000000000000000000000000000
--- a/ios/chrome/browser/ui/content_suggestions/content_suggestion_identifier.h
+++ /dev/null
@@ -1,30 +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.
-
-#ifndef IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTION_IDENTIFIER_H_
-#define IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTION_IDENTIFIER_H_
-
-#import <Foundation/Foundation.h>
-
-#include <string>
-
-@class ContentSuggestionsSectionInformation;
-
-// An class identifying a suggestion.
-@interface ContentSuggestionIdentifier : NSObject
-
-@property(nonatomic, strong) ContentSuggestionsSectionInformation* sectionInfo;
-// Must be unique inside a section.
-@property(nonatomic, assign) std::string IDInSection;
-
-@end
-
-// A protocol for an object having an ID.
-@protocol ContentSuggestionIdentification
-
-@property(nonatomic, strong) ContentSuggestionIdentifier* suggestionIdentifier;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTION_IDENTIFIER_H_