Remove remaining dead code that was used to implement grouped permission drop downs

chrome/browser/ui/page_info/permission_menu_model.h

Index: chrome/browser/ui/page_info/permission_menu_model.h
diff --git a/chrome/browser/ui/page_info/permission_menu_model.h b/chrome/browser/ui/page_info/permission_menu_model.h
index d6d01e54dbbc8f5e3c54b40c8278de9da309f696..d34d9ae5d46990f9b7e343104046886638c0bb5f 100644
--- a/chrome/browser/ui/page_info/permission_menu_model.h
+++ b/chrome/browser/ui/page_info/permission_menu_model.h
@@ -26,14 +26,6 @@ class PermissionMenuModel : public ui::SimpleMenuModel,
                       const GURL& url,
                       const PageInfoUI::PermissionInfo& info,
                       const ChangeCallback& callback);
-  // Creates a special-case menu model that only has the allow and block
-  // options.  It does not track a permission type.  |setting| is the
-  // initial selected option.  It must be either CONTENT_SETTING_ALLOW or
-  // CONTENT_SETTING_BLOCK.
-  PermissionMenuModel(Profile* profile,
-                      const GURL& url,
-                      ContentSetting setting,
-                      const ChangeCallback& callback);
   ~PermissionMenuModel() override;
 
   // Overridden from ui::SimpleMenuModel::Delegate: