- Remove the legacy debug protocol.

tests/standalone/debugger/stepping_test.dart

Index: tests/standalone/debugger/stepping_test.dart
diff --git a/tests/standalone/debugger/stepping_test.dart b/tests/standalone/debugger/stepping_test.dart
deleted file mode 100644
index d8f37d2071bb274b75c1d2d7e603a30e3af9dc2d..0000000000000000000000000000000000000000
--- a/tests/standalone/debugger/stepping_test.dart
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright (c) 2013, 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.
-
-import "debug_lib.dart";
-
-main(List<String> arguments) {
-  if (RunScript(testScript, arguments)) return;
-
-  bar();
-}
-
-void bar() {
-  print('foo1');
-  print('foo2');
-  print('foo3');
-}
-
-/**
- * Set a breakpoint, resume to that breakpoint, step once, and verify that the
- * step worked.
- */
-var testScript = [
-  MatchFrames(["main"]),
-  SetBreakpoint(15),
-  Resume(),
-  MatchFrames(["bar"]),
-  Step(),
-  MatchFrames(["bar"]),
-  Resume(),
-];