Revert "Add a WPT for pointerevent user activation trigger."

This reverts commit 34b3146d8dfc1e44715703e4cf97779fc7c8688d.

Reason for revert: Suspected cause of crbug.com/1269035, will
verify before submitting.

Original change's description:
> Add a WPT for pointerevent user activation trigger.
>
> Related to HTML issue: whatwg/html#3849
>
> Also fix double-activation in Chrome's gesture tap.
>
> Bug: 826293, 1265587
> Change-Id: I3bc3bcbcfeda242512fb777a1c8881c475fed5fc
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3254213
> Reviewed-by: Robert Flack <flackr@chromium.org>
> Reviewed-by: Avi Drissman <avi@chromium.org>
> Commit-Queue: Mustaq Ahmed <mustaq@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#940118}

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 826293, 1265587
Change-Id: I4bc041f2254c382c00ce3596d61742ba84c79660
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3277061
Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Reviewed-by: Johann Koenig <johannkoenig@google.com>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Commit-Queue: Johann Koenig <johannkoenig@google.com>
Owners-Override: Johann Koenig <johannkoenig@google.com>
Cr-Commit-Position: refs/heads/main@{#940996}

html/user-activation/activation-trigger-mouse-right.html

@@ -17,7 +17,8 @@ <h1>Test for right-click activation trigger</h1>
   <script>
     promise_test(async () => {
         var actions = new test_driver.Actions();
-        actions.pointerMove(0, 0, {origin: document.body})
+        actions_promise = actions
+            .pointerMove(0, 0, {origin: document.body})
             .pointerDown({button: actions.ButtonType.RIGHT})
             .pointerUp({button: actions.ButtonType.RIGHT})
             .send();