Remove dead code in spell checker

third_party/WebKit/public/blink_headers.gypi

 # Copyright 2015 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.
 
 {
   'variables': {
     'blink_public_sources': [
       "platform/callback/WebClosure.h",
       "platform/Platform.h",
       "platform/FilePathConversion.h",
@@ skipping 433 matching lines @@
       "web/WebSpeechRecognitionParams.h",
       "web/WebSpeechRecognitionResult.h",
       "web/WebSpeechRecognizer.h",
       "web/WebSpeechRecognizerClient.h",
       "web/WebSpellCheckClient.h",
       "web/WebStorageEventDispatcher.h",
       "web/WebSurroundingText.h",
       "web/WebTestingSupport.h",
       "web/WebTextCheckingCompletion.h",
       "web/WebTextCheckingResult.h",
-      "web/WebTextCheckingType.h",
       "web/WebTextDecorationType.h",
       "web/WebTextDirection.h",
       "web/WebTextInputInfo.h",
       "web/WebTextInputType.h",
       "web/WebTouchAction.h",
       "web/WebTreeScopeType.h",
       "web/WebURLLoaderOptions.h",
       "web/WebUserGestureIndicator.h",
       "web/WebUserGestureToken.h",
       "web/WebUserMediaClient.h",
       "web/WebUserMediaRequest.h",
       "web/WebView.h",
       "web/WebViewClient.h",
       "web/WebWidget.h",
       "web/WebWidgetClient.h",
       "web/WebWindowFeatures.h",
       "web/WebWorkerContentSettingsClientProxy.h",
       "web/linux/WebFontRendering.h",
       "web/mac/WebScrollbarTheme.h",
       "web/mac/WebSubstringUtil.h",
       "web/modules/notifications/WebNotificationPermissionCallback.h",
       "web/modules/serviceworker/WebServiceWorkerContextClient.h",
       "web/modules/serviceworker/WebServiceWorkerContextProxy.h",
       "web/modules/serviceworker/WebServiceWorkerNetworkProvider.h",
       "web/win/WebFontRendering.h",
     ],
   },
 }