LanguageSettingsPrivateGetLanguageListFunction has unused variable

Remove unused locale_set from method
LanguageSettingsPrivateGetLanguageListFunction::Run

Bug: 1046955
Change-Id: Ie913d5700ea9f4bf71d3824b14f8fbb0f754f942
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2028933Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Bruce Long <brlong@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#736880}

chrome/browser/extensions/api/language_settings_private/language_settings_private_api.cc

@@ -204,10 +204,6 @@ LanguageSettingsPrivateGetLanguageListFunction::Run() {
   translate::TranslatePrefs::GetLanguageInfoList(
       app_locale, translate_prefs->IsTranslateAllowedByPolicy(), &languages);
 
-  // Get the list of available locales (display languages) and convert to a set.
-  const base::flat_set<std::string> locale_set(
-      l10n_util::GetAvailableLocales());
-
   // Get the list of spell check languages and convert to a set.
   std::vector<std::string> spellcheck_languages =
       spellcheck::SpellCheckLanguages();