Delete support for source mirrors

tests/compiler/dart2js/memory_compiler.dart

 // Copyright (c) 2016, 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 dart2js.test.memory_compiler;
 
 import 'dart:async';
 
 import 'package:compiler/compiler.dart' show
     DiagnosticHandler;
 import 'package:compiler/compiler_new.dart' show
     CompilationResult,
     CompilerDiagnostics,
     CompilerOutput,
     Diagnostic,
     PackagesDiscoveryProvider;
 import 'package:compiler/src/diagnostics/messages.dart' show
     Message;
-import 'package:compiler/src/mirrors/source_mirrors.dart';
-import 'package:compiler/src/mirrors/analyze.dart';
 import 'package:compiler/src/null_compiler_output.dart' show
     NullCompilerOutput;
 import 'package:compiler/src/library_loader.dart' show
     LoadedLibraries;
 import 'package:compiler/src/options.dart' show
     CompilerOptions;
 
 import 'memory_source_file_helper.dart';
 
 export 'output_collector.dart';
@@ skipping 221 matching lines @@
       handler = (Uri uri, int begin, int end, String message, Diagnostic kind) {
         diagnosticHandler(uri, begin, end, message, kind);
         formattingHandler(uri, begin, end, message, kind);
       };
     }
   } else if (diagnosticHandler == null) {
     handler = (Uri uri, int begin, int end, String message, Diagnostic kind) {};
   }
   return handler;
 }
-
-Future<MirrorSystem> mirrorSystemFor(Map<String,String> memorySourceFiles,
-                                     {DiagnosticHandler diagnosticHandler,
-                                      List<String> options: const [],
-                                      bool showDiagnostics: true}) {
-  Uri libraryRoot = Uri.base.resolve('sdk/');
-  Uri packageRoot = Uri.base.resolve(Platform.packageRoot);
-
-  var provider = new MemorySourceFileProvider(memorySourceFiles);
-  var handler =
-      createDiagnosticHandler(diagnosticHandler, provider, showDiagnostics);
-
-  List<Uri> libraries = <Uri>[];
-  memorySourceFiles.forEach((String path, _) {
-    libraries.add(new Uri(scheme: 'memory', path: path));
-  });
-
-  return analyze(libraries, libraryRoot, packageRoot,
-                 provider, handler, options);
-}