Revert of Make Hands-Off Zero-Touch Enrollment compatibile with tests

chrome/browser/chromeos/login/startup_utils.h

Index: chrome/browser/chromeos/login/startup_utils.h
diff --git a/chrome/browser/chromeos/login/startup_utils.h b/chrome/browser/chromeos/login/startup_utils.h
index 6f9d4ef18dd36ec60b3602e875b1b988d96b3422..a5b991f8670204bfb94aba1d55c056a97ef7dc5a 100644
--- a/chrome/browser/chromeos/login/startup_utils.h
+++ b/chrome/browser/chromeos/login/startup_utils.h
@@ -59,15 +59,6 @@
   // Sets initial locale in local settings.
   static void SetInitialLocale(const std::string& locale);
 
-  // Saves the time of the last update check which did not result in any update.
-  static void SaveTimeOfLastUpdateCheckWithoutUpdate(base::Time time);
-
-  // Clears the update check time which was previously saved.
-  static void ClearTimeOfLastUpdateCheckWithoutUpdate();
-
-  // Returns the time of the last update check which did not lead to an update.
-  static base::Time GetTimeOfLastUpdateCheckWithoutUpdate();
-
   // Registers OOBE preferences.
   static void RegisterPrefs(PrefRegistrySimple* registry);
 };