Remove all the now dead Locale code.

sky/engine/core/dom/Document.cpp

Index: sky/engine/core/dom/Document.cpp
diff --git a/sky/engine/core/dom/Document.cpp b/sky/engine/core/dom/Document.cpp
index d9ac0852757e570a2ae8b02ca071715e4bd7cddb..464937042f359baf6aa2a272ef06da7878de64d9 100644
--- a/sky/engine/core/dom/Document.cpp
+++ b/sky/engine/core/dom/Document.cpp
@@ -140,7 +140,6 @@
 #include "platform/TraceEvent.h"
 #include "platform/network/HTTPParsers.h"
 #include "platform/scroll/Scrollbar.h"
-#include "platform/text/PlatformLocale.h"
 #include "platform/text/SegmentedString.h"
 #include "platform/weborigin/SchemeRegistry.h"
 #include "public/platform/Platform.h"
@@ -2980,17 +2979,6 @@ void Document::updateHoverActiveState(const HitTestRequest& request, Element* in
     }
 }
 
-Locale& Document::getCachedLocale(const AtomicString& locale)
-{
-    AtomicString localeKey = locale;
-    if (locale.isEmpty() || !RuntimeEnabledFeatures::langAttributeAwareFormControlUIEnabled())
-        return Locale::defaultLocale();
-    LocaleIdentifierToLocaleMap::AddResult result = m_localeCache.add(localeKey, nullptr);
-    if (result.isNewEntry)
-        result.storedValue->value = Locale::create(localeKey);
-    return *(result.storedValue->value);
-}
-
 Document& Document::ensureTemplateDocument()
 {
     if (isTemplateDocument())