[Mac] Remove some dead avatar menu code

chrome/browser/ui/cocoa/profiles/avatar_icon_controller.h

 // Copyright 2014 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 CHROME_BROWSER_UI_COCOA_PROFILES_AVATAR_ICON_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_PROFILES_AVATAR_ICON_CONTROLLER_H_
 
 #import <AppKit/AppKit.h>
 
 #import "base/mac/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/profiles/avatar_base_controller.h"
 
-@class AvatarLabelButton;
 class Browser;
 
-// This view controller manages the button/image that sits in the top of the
-// window frame when using multi-profiles. It shows the current profile's
-// avatar, or, when in Incognito, the spy dude. With multi-profiles, clicking
-// will open the profile menu; in Incognito, clicking will do nothing.
+// This view controller manages the image that sits in the top of the window
+// frame in Incognito, the spy dude. For regular and guest profiles,
+// AvatarButtonController is used instead.
 @interface AvatarIconController : AvatarBaseController {
- @private
-  // The supervised user avatar label button. Only used for supervised user
-  // profiles.
-  base::scoped_nsobject<AvatarLabelButton> labelButton_;
 }
 
-// The supervised user avatar label button view.
-@property(readonly, nonatomic) NSButton* labelButtonView;
-
 // Designated initializer.
 - (id)initWithBrowser:(Browser*)browser;
 
-// Sets the image to be used as the avatar. This will have a drop shadow applied
-// and will be resized to the frame of the button.
-- (void)setImage:(NSImage*)image;
-
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_PROFILES_AVATAR_ICON_CONTROLLER_H_