Revert "Add _CheckAndroidNullAwayAnnotatedClasses PRESUBMIT check"

This reverts commit cfe861e365f1c00b7dae00cae8cdcf69cf4123e1.

Reason for revert: Doesn't ignore comments

Original change's description:
> Add _CheckAndroidNullAwayAnnotatedClasses PRESUBMIT check
>
> Warn when a .java file is missing @NullMarked and @NullUnmarked.
>
> Temporarily disabled in //android_webview and //chrome while migrating.
>
> Bug: 404884589
> Change-Id: I38e331bcec6f3a3f2147c0999fd4dca8fef145d5
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6373892
> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
> Reviewed-by: Andrew Grieve <agrieve@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1435461}

Bug: 404884589
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I669658f3f21cab9365f0c50b4e0191a1e6a608a0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6377728
Auto-Submit: Henrique Nakashima <hnakashima@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1435593}