Simplify InputMethodWin initialization.

ui/base/ime/input_method_minimal.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/base/ime/input_method_minimal.h"
 
 #include "ui/base/ime/text_input_client.h"
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
 
@@ skipping 34 matching lines @@
 void InputMethodMinimal::OnCaretBoundsChanged(const TextInputClient* client) {}
 
 void InputMethodMinimal::CancelComposition(const TextInputClient* client) {}
 
 void InputMethodMinimal::OnInputLocaleChanged() {}
 
 std::string InputMethodMinimal::GetInputLocale() {
   return std::string();
 }
 
-bool InputMethodMinimal::IsActive() {
-  return true;
-}
-
 bool InputMethodMinimal::IsCandidatePopupOpen() const {
   return false;
 }
 
 }  // namespace ui