Remove runtime.js layout test

They are replaced by DevTools unittests in
https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2406154

TBR=aerotwist@chromium.org

Change-Id: Iec1e479e8716f3656406efb3c55684cc188a5f4f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2404446Reviewed-by: Tim van der Lippe <tvanderlippe@chromium.org>
Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org>
Auto-Submit: Tim van der Lippe <tvanderlippe@chromium.org>
Cr-Commit-Position: refs/heads/master@{#806168}

third_party/blink/web_tests/http/tests/devtools/runtime-expected.txt

-This test checks various Runtime functions.
-
-
-Running: substituteURL
-"no url here" -> "no url here"
-"@url()" -> "fake_module/"
-"@url(file.js)" -> "fake_module/file.js"
-"before @url(long/path/to/the/file.png) after" -> "before fake_module/long/path/to/the/file.png after"
-"@url(first.png)@url(second.gif)" -> "fake_module/first.pngfake_module/second.gif"
-"a lot of @url(stuff) in a@url(single)line and more url() @@url (not/a/resource.gif)" -> "a lot of fake_module/stuff in afake_module/singleline and more url() @@url (not/a/resource.gif)"
-

third_party/blink/web_tests/http/tests/devtools/runtime.js

-// Copyright 2017 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-(async function() {
-  TestRunner.addResult(`This test checks various Runtime functions.\n`);
-
-
-  function findLoadedModule() {
-    var modules = self.runtime._modules;
-    for (var module of modules) {
-      if (module._loadedForTest)
-        return module;
-    }
-
-    TestRunner.addResult('Fail: not a single module loaded');
-    TestRunner.completeTest();
-  }
-
-  TestRunner.runTestSuite([function substituteURL(next) {
-    var module = findLoadedModule();
-    var moduleName = module._name;
-    module._name = 'fake_module';
-
-    testValue('no url here');
-    testValue('@url()');
-    testValue('@url(file.js)');
-    testValue('before @url(long/path/to/the/file.png) after');
-    testValue('@url(first.png)@url(second.gif)');
-    testValue('a lot of @url(stuff) in a@url(single)line and more url() @@url (not/a/resource.gif)');
-
-    function testValue(value) {
-      TestRunner.addResult('"' + value + '" -> "' + module.substituteURL(value) + '"');
-    }
-
-    module._name = moduleName;
-    next();
-  }]);
-})();