Remove deprecated code

pkg/analyzer/lib/src/generated/testing/element_factory.dart

 // Copyright (c) 2014, 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 engine.testing.element_factory;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/constant.dart';
@@ skipping 391 matching lines @@
         new PropertyAccessorElementImpl.forVariable(field);
     getter.getter = true;
     getter.variable = field;
     getter.returnType = type;
     field.getter = getter;
     FunctionTypeImpl getterType = new FunctionTypeImpl(getter);
     getter.type = getterType;
     return getter;
   }
 
-  @deprecated
-  static HtmlElementImpl htmlUnit(AnalysisContext context, String fileName) {
-    Source source =
-        new NonExistingSource(fileName, toUri(fileName), UriKind.FILE_URI);
-    HtmlElementImpl unit = new HtmlElementImpl(context, fileName);
-    unit.source = source;
-    return unit;
-  }
-
   static ImportElementImpl importFor(
       LibraryElement importedLibrary, PrefixElement prefix,
       [List<NamespaceCombinator> combinators =
           NamespaceCombinator.EMPTY_LIST]) {
     ImportElementImpl spec = new ImportElementImpl(0);
     spec.importedLibrary = importedLibrary;
     spec.prefix = prefix;
     spec.combinators = combinators;
     return spec;
   }
@@ skipping 186 matching lines @@
   }
 
   static TypeParameterElementImpl typeParameterWithType(String name,
       [DartType bound]) {
     TypeParameterElementImpl typeParameter = typeParameterElement(name);
     typeParameter.type = new TypeParameterTypeImpl(typeParameter);
     typeParameter.bound = bound;
     return typeParameter;
   }
 }