Remove deprecated dart:utf library.

runtime/vm/object.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 2526 matching lines @@
 
   static RawLibrary* AsyncLibrary();
   static RawLibrary* CoreLibrary();
   static RawLibrary* CollectionLibrary();
   static RawLibrary* CollectionDevLibrary();
   static RawLibrary* IsolateLibrary();
   static RawLibrary* MathLibrary();
   static RawLibrary* MirrorsLibrary();
   static RawLibrary* NativeWrappersLibrary();
   static RawLibrary* TypedDataLibrary();
-  static RawLibrary* UtfLibrary();
 
   // Eagerly compile all classes and functions in the library.
   static RawError* CompileAll();
 
   // Checks function fingerprints. Prints mismatches and aborts if
   // mismatch found.
   static void CheckFunctionFingerprints();
 
   static bool IsPrivate(const String& name);
   // Construct the full name of a corelib member.
@@ skipping 3737 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_