Revert "[inspector] added inspector test runner [part 3-5]"

test/inspector/debugger/set-breakpoint-before-enabling.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.
-
-InspectorTest.sendCommand("Debugger.setBreakpointByUrl", { url: "http://example.com", lineNumber: 10  }, didSetBreakpointByUrlBeforeEnable);
-
-function didSetBreakpointByUrlBeforeEnable(message)
-{
-  InspectorTest.log("setBreakpointByUrl error: " + JSON.stringify(message.error, null, 2));
-  InspectorTest.sendCommand("Debugger.setBreakpoint", {}, didSetBreakpointBeforeEnable);
-}
-
-function didSetBreakpointBeforeEnable(message)
-{
-  InspectorTest.log("setBreakpoint error: " + JSON.stringify(message.error, null, 2));
-  InspectorTest.completeTest();
-}