More pre-MD cleanup

ash/common/system/tray/system_tray_delegate.h

Index: ash/common/system/tray/system_tray_delegate.h
diff --git a/ash/common/system/tray/system_tray_delegate.h b/ash/common/system/tray/system_tray_delegate.h
index 8ca219074ed5e7185eae2881e0b7d87a97a40560..a99cded4ea052a95e084d72f7bc3bd2d1b8fa1fc 100644
--- a/ash/common/system/tray/system_tray_delegate.h
+++ b/ash/common/system/tray/system_tray_delegate.h
@@ -125,11 +125,6 @@ class ASH_EXPORT SystemTrayDelegate {
   // Retrieves the session length limit. Returns |false| if no limit is set.
   virtual bool GetSessionLengthLimit(base::TimeDelta* session_length_limit);
 
-  // Get the system tray menu size in pixels (dependent on the language).
-  // This is not used in material design and should be removed during pre-MD
-  // code cleanup. See https://crbug.com/614453.
-  virtual int GetSystemTrayMenuWidth();
-
   // The active user has been changed. This will be called when the UI is ready
   // to be switched to the new user.
   // Note: This will happen after SessionStateObserver::ActiveUserChanged fires.