Remove service-compiler related code.

tests/service_tests/performance/performance_service_impl.dart

-// Copyright (c) 2015, the Dartino 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.md file.
-
-import 'dart/performance_service.dart';
-
-class PerformanceServiceImpl implements PerformanceService {
-  int echo(int n) => n;
-
-  int countTreeNodes(TreeNode node) {
-    int sum = 1;
-    List<TreeNode> children = node.children;
-    for (int i = 0; i < children.length; i++) {
-      sum += countTreeNodes(children[i]);
-    }
-    return sum;
-  }
-
-  void buildTree(int n, TreeNodeBuilder node) {
-    if (n > 1) {
-      List<TreeNodeBuilder> children = node.initChildren(2);
-      buildTree(n - 1, children[0]);
-      buildTree(n - 1, children[1]);
-    }
-  }
-}
-
-main() {
-  var impl = new PerformanceServiceImpl();
-  PerformanceService.initialize(impl);
-  while (PerformanceService.hasNextEvent()) {
-    PerformanceService.handleNextEvent();
-  }
-}