Removes dependency on v8 from dartc testing

compiler/java/com/google/dart/runner/RunnerError.java

Index: compiler/java/com/google/dart/runner/RunnerError.java
diff --git a/compiler/java/com/google/dart/runner/RunnerError.java b/compiler/java/com/google/dart/runner/RunnerError.java
deleted file mode 100644
index a5c8e33457cfb64e285e58b3d770ad1b00412bd7..0000000000000000000000000000000000000000
--- a/compiler/java/com/google/dart/runner/RunnerError.java
+++ /dev/null
@@ -1,19 +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.
-
-package com.google.dart.runner;
-
-public class RunnerError extends Exception {
-  public RunnerError(String message) {
-    super(message);
-  }
-
-  RunnerError(String message, Throwable cause) {
-    super(message, cause);
-  }
-
-  RunnerError(Throwable cause) {
-    super(cause);
-  }
-}