Bug 1797461 - remove obsolete test_nss_shutdown.js test r=jschanck

Because nsNSSComponent doesn't shut down NSS any longer, this test isn't
testing a valid configuration of gecko and can be removed.

Differential Revision: https://phabricator.services.mozilla.com/D160579

security/manager/ssl/tests/unit/test_nss_shutdown.js

@@ -1,48 +0,0 @@
-/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-"use strict";
-
-// This test attempts to ensure that PSM doesn't deadlock or crash when shutting
-// down NSS while a background thread is attempting to use NSS.
-// Uses test_signed_apps/app_mf-1_sf-1_p7-1.zip from test_signed_apps.js.
-
-function startAsyncNSSOperation(certdb, appFile) {
-  return new Promise((resolve, reject) => {
-    certdb.openSignedAppFileAsync(
-      Ci.nsIX509CertDB.AppXPCShellRoot,
-      appFile,
-      function(rv, aZipReader, aSignerCert) {
-        // rv will either indicate success (if NSS hasn't been shut down yet) or
-        // it will be some error code that varies depending on when NSS got shut
-        // down. As such, there's nothing really to check here. Just resolve the
-        // promise to continue execution.
-        resolve();
-      }
-    );
-  });
-}
-
-add_task(async function() {
-  do_get_profile();
-  let psm = Cc["@mozilla.org/psm;1"]
-    .getService(Ci.nsISupports)
-    .QueryInterface(Ci.nsIObserver);
-  let certdb = Cc["@mozilla.org/security/x509certdb;1"].getService(
-    Ci.nsIX509CertDB
-  );
-  let appFile = do_get_file("test_signed_apps/app_mf-1_sf-1_p7-1.zip");
-
-  let promises = [];
-  for (let i = 0; i < 25; i++) {
-    promises.push(startAsyncNSSOperation(certdb, appFile));
-  }
-  // Trick PSM into thinking it should shut down NSS. If this test doesn't
-  // hang or crash, we're good.
-  psm.observe(null, "profile-before-change", null);
-  for (let i = 0; i < 25; i++) {
-    promises.push(startAsyncNSSOperation(certdb, appFile));
-  }
-  await Promise.all(promises);
-});

security/manager/ssl/tests/unit/xpcshell.ini

@@ -159,7 +159,6 @@ run-sequentially = hardcoded ports
 run-sequentially = hardcoded ports
 [test_nsIX509Cert_utf8.js]
 [test_nsIX509CertValidity.js]
-[test_nss_shutdown.js]
 [test_ocsp_caching.js]
 run-sequentially = hardcoded ports
 [test_ocsp_enabled_pref.js]