Revert "Add field trial testing config for Friendlier Safe Browsing Settings"

This reverts commit b04781fa05ff1532796f80dc4b97d8e2491014cb.

Reason for revert: I believe this commit is making iOS builders fail due
to the field trial config change. Please run your follow-up CL on
ios-simulator-full-configs and ios-simulator-noncq to test your changes.

Original change's description:
> Add field trial testing config for Friendlier Safe Browsing Settings
>
> Bug: 1465881
> Change-Id: I5f423deb531ec90f05bce253b3f185342d20f45b
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4850689
> Reviewed-by: Xinghui Lu <xinghuilu@chromium.org>
> Commit-Queue: Awad Osman <awado@google.com>
> Reviewed-by: Javier Castro <jacastro@chromium.org>
> Reviewed-by: Rubin Deliallisi <rubindl@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1195975}

Bug: 1465881
Change-Id: Ib9bd79f2a49524ddd42e9420beffe29ccbf04f80
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4861984
Reviewed-by: Javier Castro <jacastro@chromium.org>
Reviewed-by: Robbie Gibson <rkgibson@google.com>
Owners-Override: Keren Zhu <kerenzhu@google.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Nicolas MacBeth <nicolasmacbeth@google.com>
Owners-Override: Robbie Gibson <rkgibson@google.com>
Commit-Queue: Nicolas MacBeth <nicolasmacbeth@google.com>
Cr-Commit-Position: refs/heads/main@{#1196069}