Revert "tools/perf: Disable blink_perf.parser.declarative-shadow-dom-cloning on Mac"

This reverts commit 4039312e.

Reason for revert: I believe this failure was already fixed. See https://bugs.chromium.org/p/chromium/issues/detail?id=1147058#c3.

Original change's description:
> tools/perf: Disable blink_perf.parser.declarative-shadow-dom-cloning on Mac
>
> NOTRY=true
> TBR=masonfreed@chromium.org
>
> Bug: 1147058
> Change-Id: Ica80747af140f1c1eddff795fd14c709314647ca
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2526069
> Reviewed-by: Sami Kyöstilä <skyostil@chromium.org>
> Commit-Queue: Sami Kyöstilä <skyostil@chromium.org>
> Auto-Submit: Sami Kyöstilä <skyostil@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#825352}

TBR=skyostil@chromium.org,masonfreed@chromium.org

Change-Id: Idcfe52f204e76cd495a37c619ef66f39dc4119a6
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1147058
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2525854Reviewed-by: Mason Freed <masonfreed@chromium.org>
Commit-Queue: Mason Freed <masonfreed@chromium.org>
Cr-Commit-Position: refs/heads/master@{#825367}

tools/perf/expectations.config

@@ -65,7 +65,6 @@ crbug.com/966913 [ android-nexus-5x android-webview ] blink_perf.parser/query-se
 crbug.com/966613 [ android-pixel-2 ] blink_perf.parser/query-selector-all-class-deep.html [ Skip ]
 crbug.com/966613 [ android-pixel-2 ] blink_perf.parser/query-selector-all-deep.html [ Skip ]
 crbug.com/966613 [ android-pixel-2 ] blink_perf.parser/query-selector-all-id-deep.html [ Skip ]
-crbug.com/1147058 [ mac ] blink_perf.parser/declarative-shadow-dom-cloning.html [ Skip ]
 
 # Benchmark: blink_perf.shadow_dom
 crbug.com/702319 [ android-nexus-5x ] blink_perf.shadow_dom/* [ Skip ]