Remove Yoshi charger recall pop up warning UI code.

ash/system/tray/system_tray_delegate.h

Index: ash/system/tray/system_tray_delegate.h
diff --git a/ash/system/tray/system_tray_delegate.h b/ash/system/tray/system_tray_delegate.h
index 6e093aa9669a6786f210a7914b655369b6f62f71..228865b388c2757e1dab99596e0d8d72b241e164 100644
--- a/ash/system/tray/system_tray_delegate.h
+++ b/ash/system/tray/system_tray_delegate.h
@@ -199,16 +199,6 @@ class ASH_EXPORT SystemTrayDelegate {
   // Shows login UI to add other users to this session.
   virtual void ShowUserLogin() = 0;
 
-  // Shows the spring charger replacement dialog if necessary.
-  // Returns true if the dialog is shown by the call.
-  virtual bool ShowSpringChargerReplacementDialog() = 0;
-
-  // True if the spring charger replacement dialog is visible.
-  virtual bool IsSpringChargerReplacementDialogVisible() = 0;
-
-  // True if user has confirmed using safe spring charger.
-  virtual bool HasUserConfirmedSafeSpringCharger() = 0;
-
   // Attempts to shut down the system.
   virtual void ShutDown() = 0;