Removed obsolete code

utils/css/css.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 css;
-
-import 'dart:math' as Math;
-import '../lib/file_system.dart';
-import '../lib/file_system_memory.dart';
-
-part 'cssoptions.dart';
-part 'source.dart';
-part 'tokenkind.dart';
-part 'token.dart';
-part 'tokenizer_base.dart';
-part 'tokenizer.dart';
-part 'treebase.dart';
-part 'tree.dart';
-part 'cssselectorexception.dart';
-part 'cssworld.dart';
-part 'parser.dart';
-part 'validate.dart';
-part 'generate.dart';
-part 'world.dart';
-
-
-void initCssWorld([bool commandLine = true]) {
-  FileSystem fs = new MemoryFileSystem();
-  parseOptions([], fs);
-  initializeWorld(fs);
-
-  // TODO(terry): Should be set by arguments.  When run as a tool these aren't
-  // set when run internaly set these so we can compile CSS and catch any
-  // problems programmatically.
-  options.throwOnErrors = true;
-  options.throwOnFatal = true;
-  options.useColors = commandLine ? true : false;
-  options.warningsAsErrors = false;
-  options.showWarnings = true;
-}
-
-// TODO(terry): Add obfuscation mapping file.
-void cssParseAndValidate(String cssExpression, CssWorld cssworld) {
-  Parser parser = new Parser(new SourceFile(SourceFile.IN_MEMORY_FILE,
-      cssExpression));
-  var tree = parser.parseTemplate();
-  if (tree != null) {
-    Validate.template(tree.selectors, cssworld);
-  }
-}
-
-// Returns pretty printed tree of the expression.
-String cssParseAndValidateDebug(String cssExpression, CssWorld cssworld) {
-  Parser parser = new Parser(new SourceFile(SourceFile.IN_MEMORY_FILE,
-      cssExpression));
-  String output = "";
-  String prettyTree = "";
-  try {
-    var tree = parser.parseTemplate();
-    if (tree != null) {
-      prettyTree = tree.toDebugString();
-      Validate.template(tree.selectors, cssworld);
-      output = prettyTree;
-    }
-  } catch (e) {
-    String error = e.toString();
-    output = "$error\n$prettyTree";
-    throw e;
-  }
-
-  return output;
-}