Get rid of unused callbacks from ui::InputMethodObserver

ui/base/ime/input_method_base.cc

Index: ui/base/ime/input_method_base.cc
diff --git a/ui/base/ime/input_method_base.cc b/ui/base/ime/input_method_base.cc
index 44d52fa292043fb1b275404b4f6baf6c93ce0ba4..5cc916d4b0cf67eddba1fbe1645477f7a5020d51 100644
--- a/ui/base/ime/input_method_base.cc
+++ b/ui/base/ime/input_method_base.cc
@@ -70,12 +70,6 @@ void InputMethodBase::OnCaretBoundsChanged(const TextInputClient* client) {
                     OnCaretBoundsChanged(client));
 }
 
-void InputMethodBase::OnInputLocaleChanged() {
-  FOR_EACH_OBSERVER(InputMethodObserver,
-                    observer_list_,
-                    OnInputLocaleChanged());
-}
-
 TextInputType InputMethodBase::GetTextInputType() const {
   TextInputClient* client = GetTextInputClient();
   return client ? client->GetTextInputType() : TEXT_INPUT_TYPE_NONE;