Delete support for source mirrors

tests/compiler/dart2js/memory_compiler.dart

Index: tests/compiler/dart2js/memory_compiler.dart
diff --git a/tests/compiler/dart2js/memory_compiler.dart b/tests/compiler/dart2js/memory_compiler.dart
index 47c1a43e72866d2929d4b39b66f3b0fdc03fb5f0..c39f44279c00e2441991440f9e656a00c7df84c6 100644
--- a/tests/compiler/dart2js/memory_compiler.dart
+++ b/tests/compiler/dart2js/memory_compiler.dart
@@ -16,8 +16,6 @@ import 'package:compiler/compiler_new.dart' show
     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
@@ -259,23 +257,3 @@ DiagnosticHandler createDiagnosticHandler(DiagnosticHandler diagnosticHandler,
   }
   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);
-}