[debug] remove JSON debug protocol related tests.

test/inspector/runtime/evaluate-empty-stack.js

+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+print("Tests that Runtime.evaluate works with an empty stack");
+
+InspectorTest.addScript("var text = [48116210, 34460128, 1406661984071834]");
+
+var message = { expression: "text.map(x => x.toString(36)).join(' ')" };
+
+Protocol.Runtime.evaluate(message)
+  .then(message => InspectorTest.logMessage(message))
+  .then(() => InspectorTest.completeTest());