Re-enable clip-path-inline-001.html

According to FlakePortal[0] and the legacy dashboard[1] this hasn't
flaked since 2019/09/09. It seems worth attempting to renable it.

[0]: https://analysis.chromium.org/p/chromium/flake-portal/flakes/occurrences?key=ag9zfmZpbmRpdC1mb3ItbWVybwsSBUZsYWtlImRjaHJvbWl1bUBibGlua193ZWJfdGVzdHNfZXhwYXJjaGl2ZUBleHRlcm5hbC93cHQvY3NzL2Nzcy1tYXNraW5nL2NsaXAtcGF0aC9jbGlwLXBhdGgtaW5saW5lLTAwMS5odG1sDA

[1]: https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=webkit_layout_tests%20(with%20patch)&tests=external/wpt/css/css-masking/clip-path/clip-path-inline-001.html

Bug: 1001936
Change-Id: I85bbf8ec315c708244d42f9793d598865ad196f6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2110218Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Commit-Queue: Stephen McGruer <smcgruer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#751990}

third_party/blink/web_tests/TestExpectations

@@ -6011,7 +6011,6 @@ crbug.com/1000768 [ Linux ] external/wpt/storage/idlharness.https.any.html [ Pas
 crbug.com/1001817 external/wpt/css/css-ui/text-overflow-016.html [ Pass Failure ]
 crbug.com/1001816 external/wpt/css/css-masking/clip-path/clip-path-inline-003.html [ Pass Failure ]
 crbug.com/1001814 external/wpt/css/css-masking/clip-path/clip-path-inline-002.html [ Pass Failure ]
-crbug.com/1001936 external/wpt/css/css-masking/clip-path/clip-path-inline-001.html [ Pass Failure ]
 
 # Sheriff 2019-09-10
 crbug.com/1002527 [ Debug ] virtual/text-antialias/large-text-composed-char.html [ Pass Crash ]