Revert "Add referrer-policy module worker tests"

This reverts commit ec589a5ce0cd6d297605922119065cc2805d8db9.

Reason for revert: crbug.com/906964

Original change's description:
> Add referrer-policy module worker tests
>
> This CL adds WPT tests for referrer policy applied to
> module worker top-level script fetch.
>
> The only manual changes are
> - referrer-policy/generic/common.js
> - referrer-policy/generic/referrer-policy-test-case.js
> - referrer-policy/spec.src.json
> and all other modifications are made by
> referrer-policy/generic/tools/generate.py.
>
> Bug: 880027
> Change-Id: Ib1f9136161e8efacf317fb9b7e9ba0651a103c41
> Reviewed-on: https://chromium-review.googlesource.com/c/1330906
> Reviewed-by: Hiroki Nakagawa <nhiroki@chromium.org>
> Reviewed-by: Jochen Eisinger <jochen@chromium.org>
> Commit-Queue: Hiroshige Hayashizaki <hiroshige@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#609589}

TBR=hiroshige@chromium.org,nhiroki@chromium.org,jochen@chromium.org

Change-Id: I0931159c0494b981a1d6b07232af55b20f68f559
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 880027, 906964
Reviewed-on: https://chromium-review.googlesource.com/c/1344213
Reviewed-by: Hiroshige Hayashizaki <hiroshige@chromium.org>
Commit-Queue: Hiroshige Hayashizaki <hiroshige@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609731}

referrer-policy/generic/common.js

@@ -179,14 +179,6 @@ function queryWorker(url, callback) {
   };
 }
 
-function queryModuleWorkerTopLevel(url, callback) {
-  var worker = new Worker(url, {type: "module"});
-  worker.onmessage = function(event) {
-    var server_data = event.data;
-    callback(wrapResult(url, server_data), url);
-  };
-}
-
 function queryFetch(url, callback) {
   fetch(url).then(function(response) {
       response.json().then(function(server_data) {

referrer-policy/generic/referrer-policy-test-case.js

@@ -21,7 +21,6 @@ function ReferrerPolicyTestCase(scenario, testDescription, sanityChecker) {
     "img-tag":  queryImage,
     "script-tag": queryScript,
     "worker-request": queryWorker,
-    "module-worker": queryModuleWorkerTopLevel,
     "xhr-request": queryXhr
   };