cros: Remove unused method

chrome/browser/chromeos/login/enrollment/enrollment_screen_actor.h

 // Copyright (c) 2012 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_CHROMEOS_LOGIN_ENROLLMENT_ENROLLMENT_SCREEN_ACTOR_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_ENROLLMENT_ENROLLMENT_SCREEN_ACTOR_H_
 
 #include <string>
 
 #include "chrome/browser/chromeos/login/enrollment/enterprise_enrollment_helper.h"
@@ skipping 25 matching lines @@
     virtual void OnDeviceAttributeProvided(const std::string& asset_id,
                                            const std::string& location) = 0;
   };
 
   virtual ~EnrollmentScreenActor() {}
 
   // Initializes the actor with parameters.
   virtual void SetParameters(Controller* controller,
                              const policy::EnrollmentConfig& config) = 0;
 
-  // Prepare the contents to showing.
-  virtual void PrepareToShow() = 0;
-
   // Shows the contents of the screen.
   virtual void Show() = 0;
 
   // Hides the contents of the screen.
   virtual void Hide() = 0;
 
   // Shows the signin screen.
   virtual void ShowSigninScreen() = 0;
 
   // Shows the AD domain joining screen.
@@ skipping 16 matching lines @@
   // Show non-authentication error.
   virtual void ShowOtherError(EnterpriseEnrollmentHelper::OtherError error) = 0;
 
   // Update the UI to report the |status| of the enrollment procedure.
   virtual void ShowEnrollmentStatus(policy::EnrollmentStatus status) = 0;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_ENROLLMENT_ENROLLMENT_SCREEN_ACTOR_H_