Remove backends.

compiler/java/com/google/dart/compiler/testing/TestCompilerConfiguration.java

Index: compiler/java/com/google/dart/compiler/testing/TestCompilerConfiguration.java
diff --git a/compiler/java/com/google/dart/compiler/testing/TestCompilerConfiguration.java b/compiler/java/com/google/dart/compiler/testing/TestCompilerConfiguration.java
index f35c94ba1b5b25f77c24969107fab772f3561eb4..675215c37efa28b776ac5b2f108ce0841eb46d2c 100644
--- a/compiler/java/com/google/dart/compiler/testing/TestCompilerConfiguration.java
+++ b/compiler/java/com/google/dart/compiler/testing/TestCompilerConfiguration.java
@@ -1,10 +1,9 @@
-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
 package com.google.dart.compiler.testing;
 
-import com.google.dart.compiler.Backend;
 import com.google.dart.compiler.CommandLineOptions.CompilerOptions;
 import com.google.dart.compiler.CompilerConfiguration;
 import com.google.dart.compiler.DartCompilationPhase;
@@ -56,11 +55,6 @@ public class TestCompilerConfiguration implements CompilerConfiguration {
   }
 
   @Override
-  public File getOutputFilename() {
-    return null;
-  }
-
-  @Override
   public File getOutputDirectory() {
     throw new AssertionError();
   }
@@ -76,16 +70,6 @@ public class TestCompilerConfiguration implements CompilerConfiguration {
   }
 
   @Override
-  public List<Backend> getBackends() {
-    return Collections.emptyList();
-  }
-
-  @Override
-  public boolean checkOnly() {
-    return true;
-  }
-
-  @Override
   public boolean expectEntryPoint() {
     return false;
   }