Remove LoadSystemKeyboard()

ui/keyboard/content/keyboard_ui_content.h

Index: ui/keyboard/content/keyboard_ui_content.h
diff --git a/ui/keyboard/content/keyboard_ui_content.h b/ui/keyboard/content/keyboard_ui_content.h
index f86e07a69fdafb2d36e99df8216a9c15231f4b74..9548a4d7334c378e3adc85958e6beec59a89ac0c 100644
--- a/ui/keyboard/content/keyboard_ui_content.h
+++ b/ui/keyboard/content/keyboard_ui_content.h
@@ -59,10 +59,6 @@ class KEYBOARD_EXPORT KeyboardUIContent : public KeyboardUI,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback) = 0;
 
-  // Loads system virtual keyboard. Noop if the current virtual keyboard is
-  // system virtual keyboard.
-  virtual void LoadSystemKeyboard();
-
   // Called when a window being observed changes bounds, to update its insets.
   void UpdateInsetsForWindow(aura::Window* window);