Remove backends.

compiler/javatests/com/google/dart/compiler/backend/js/testListSubTypeExprOpt.dart

Index: compiler/javatests/com/google/dart/compiler/backend/js/testListSubTypeExprOpt.dart
diff --git a/compiler/javatests/com/google/dart/compiler/backend/js/testListSubTypeExprOpt.dart b/compiler/javatests/com/google/dart/compiler/backend/js/testListSubTypeExprOpt.dart
deleted file mode 100644
index 40e6510db2c37d24293eb017d3490acbf33a44d0..0000000000000000000000000000000000000000
--- a/compiler/javatests/com/google/dart/compiler/backend/js/testListSubTypeExprOpt.dart
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright (c) 2011, 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.
-
-class MyList<T> implements List<T> {
-  MyList() { }
-  T operator[](int index) { return null; }
-  void operator[]=(int index, T value) {}
-  int length;
-  void add(T value) {}
-  void addLast(T value) {}
-  void addAll(Collection<T> collection) {}
-  void sort(int f(T, T)) {}
-  void copyFrom(List<Object> src, int srcStart, int dstStart, int count) {}
-  int indexOf(T element, [int start = 0]) { return null; }
-  int lastIndexOf(T element, [int start = null]) { return null; }
-  void setRange(int start, int length_, List from, [int startFrom = 0]) {}
-  void removeRange(int start, int length_) {}
-  void insertRange(int start, int length_, [initialValue = null]) {}
-  List getRange(int start, int length_) { return null; }
-  void clear() {}
-  T removeLast() { return null; }
-  T last() { return null; }
-  void forEach(void f(T)) {}
-  List map(f(T)) { return null; }
-  Collection<T> filter(bool f(T)) { return null; }
-  bool every(bool f(T)) { return null; }
-  bool some(bool f(T)) { return null; }
-  bool isEmpty() { return null; }
-  Iterator<T> iterator() { return null; }
-}
-
-class Main {
-  static void main() {
-    // List<T> subtype (we will do better in the future, for now, take the conservative path).
-    MyList<String> _list0_ = new MyList<String>();
-    _list0_[0] = "foo";
-    String lhs0 = _list0_[0];
-  }
-}
-
-main() {
-  Main.main();
-}