Remove scanBuiltinLibraries.

sdk/lib/_internal/compiler/implementation/apiimpl.dart

 // 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.
 
 library leg_apiimpl;
 
 import 'dart:async';
 
 import '../compiler.dart' as api;
 import 'dart2jslib.dart' as leg;
@@ skipping 122 matching lines @@
 
   String lookupPatchPath(String dartLibraryName) {
     LibraryInfo info = LIBRARIES[dartLibraryName];
     if (info == null) return null;
     if (!info.isDart2jsLibrary) return null;
     String path = info.dart2jsPatchPath;
     if (path == null) return null;
     return "lib/$path";
   }
 
-  Future<elements.LibraryElement> scanBuiltinLibrary(String path) {
-    Uri uri = libraryRoot.resolve(lookupLibraryPath(path));
-    Uri canonicalUri = new Uri(scheme: "dart", path: path);
-    return libraryLoader.loadLibrary(uri, null, canonicalUri);
-  }
-
   void log(message) {
     handler(null, null, null, message, api.Diagnostic.VERBOSE_INFO);
   }
 
   /// See [leg.Compiler.translateResolvedUri].
   Uri translateResolvedUri(elements.LibraryElement importingLibrary,
                            Uri resolvedUri, tree.Node node) {
     if (resolvedUri.scheme == 'dart') {
       return translateDartUri(importingLibrary, resolvedUri, node);
     }
@@ skipping 178 matching lines @@
   }
 
   void diagnoseCrashInUserCode(String message, exception, stackTrace) {
     hasCrashed = true;
     print('$message: ${tryToString(exception)}');
     print(tryToString(stackTrace));
   }
 
   fromEnvironment(String name) => environment[name];
 }