[gardener] Revert "HTML attribute fuzzer"

This reverts commit 217a1ffac201748d3985ea1fdd4ca89625cb00a9.

Reason for revert: Consistent Linux ChromiumOS MSan Tests failures.
First failure: https://ci.chromium.org/ui/p/chromium/builders/ci/Linux%20ChromiumOS%20MSan%20Tests/48286/blamelist

Original change's description:
> HTML attribute fuzzer
>
> This is a first step toward a fuzzer for all Blink's HTML attributes,
> which is a notable gap in our coverage-guided fuzzer report (for
> instance
> https://analysis.chromium.org/coverage/p/chromium/file?host=chromium.googlesource.com&project=chromium/src&ref=refs/heads/main&revision=e3c6b61f35330afb377a2086ffadc3d7e2321d8c&path=//third_party/blink/renderer/core/html/html_anchor_element.cc&platform=fuzz&test_suite_type=any&modifier_id=0#348
> ).
>
> To run it:
> ASAN_OPTIONS=detect_odr_violation=0 out/libfuzzer/blink_unittests_BlinkAttributeFuzzTestFixture_NoElementAttributeCrashes_fuzzer
>
> This may be slightly duplicative of some other fuzzers (e.g. blackbox
> fuzzers, and the DomatoLPM fuzzer under development) but as a simple
> coverage guided fuzzer in this area it's likely to explore this code
> more rapidly than most other approaches.
>
> Cq-Include-Trybots: luci.chromium.try:linux-centipede-asan-rel
> Cq-Include-Trybots: luci.chromium.try:linux-libfuzzer-asan-rel
> Cq-Include-Trybots: luci.chromium.try:win-libfuzzer-asan-rel
> Bug: 40947696, 40286211
> Change-Id: Id2f61ab4d9d9c59b877e3760620ed059d2a4386f
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5388376
> Reviewed-by: Titouan Rigoudy <titouan@chromium.org>
> Reviewed-by: Kent Tamura <tkent@chromium.org>
> Commit-Queue: Adrian Taylor <adetaylor@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1393546}

Bug: 40947696, 40286211
Change-Id: I5ed0176fa55854c6e8bdd638f30eb36d14ff7460
Cq-Include-Trybots: luci.chromium.try:linux-centipede-asan-rel
Cq-Include-Trybots: luci.chromium.try:linux-libfuzzer-asan-rel
Cq-Include-Trybots: luci.chromium.try:win-libfuzzer-asan-rel
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6080516
Reviewed-by: Adrian Taylor <adetaylor@chromium.org>
Owners-Override: Sergey Poromov <poromov@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Sergey Poromov <poromov@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Sergey Poromov <poromov@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1393631}