[Maintenance] Clean up comments and file includes in WebLocks WPT

Change-Id: I3d8997bdd9ba493fd49234113eb0e8911f0354fe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3591492
Reviewed-by: Andrew Williams <awillia@chromium.org>
Commit-Queue: Kyra Seevers <kyraseevers@chromium.org>
Cr-Commit-Position: refs/heads/main@{#993857}
diff --git a/web-locks/partitioned-web-locks.tentative.https.html b/web-locks/partitioned-web-locks.tentative.https.html
index a506a3e..0eb0820 100644
--- a/web-locks/partitioned-web-locks.tentative.https.html
+++ b/web-locks/partitioned-web-locks.tentative.https.html
@@ -3,15 +3,13 @@
 <meta charset="utf-8"/>
 <title>Web Locks API: Partitioned WebLocks</title>
 
+<!-- Pull in get_host_info() -->
 <script src="/common/get-host-info.sub.js"></script>
 <script src="/common/utils.js"></script>
 <script src="/common/dispatcher/dispatcher.js"></script>
-<script src="/cookies/resources/cookie-helper.sub.js"></script>
-<script src="../credentialless/resources/common.js"></script>
 <script src="resources/helpers.js"></script>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
-<script src="/service-workers/service-worker/resources/test-helpers.sub.js"></script>
 <body>
 <script>
 
@@ -87,7 +85,7 @@
             assert_true(false)
             return;
           }
-          // Obtain and store the release functions for clean-up
+          // Obtain and store the release functions for clean-up.
           let lock_id = next_lock_id_2++;
           let release;
           const promise = new Promise(r => { release = r; });