Remove the ENABLE_JAVASCRIPT_I18N_API compile time flag.

Source/bindings/v8/RuntimeEnabledFeatures.cpp

Index: Source/bindings/v8/RuntimeEnabledFeatures.cpp
diff --git a/Source/bindings/v8/RuntimeEnabledFeatures.cpp b/Source/bindings/v8/RuntimeEnabledFeatures.cpp
index 4b8acef6db486fe32a78aa26d13f60e416e9a1f5..61cf8035763e43b9a9f78a8e22158b30cbc6569e 100644
--- a/Source/bindings/v8/RuntimeEnabledFeatures.cpp
+++ b/Source/bindings/v8/RuntimeEnabledFeatures.cpp
@@ -76,15 +76,6 @@ bool RuntimeEnabledFeatures::fileSystemEnabled()
     return isFileSystemEnabled && AsyncFileSystem::isAvailable();
 }
 
-#if ENABLE(JAVASCRIPT_I18N_API)
-bool RuntimeEnabledFeatures::isJavaScriptI18NAPIEnabled = false;
-
-bool RuntimeEnabledFeatures::javaScriptI18NAPIEnabled()
-{
-    return isJavaScriptI18NAPIEnabled;
-}
-#endif
-
 #if ENABLE(VIDEO)
 
 bool RuntimeEnabledFeatures::audioEnabled()