Revert "Help app: Add flags to correctly show content for allowed features."

This reverts commit 28d81e70.

Reason for revert: breaking apps.LaunchHelpAppFromLauncher.* (b/331766853)

Original change's description:
> Help app: Add flags to correctly show content for allowed features.
>
> Bug: b/321865996
> Change-Id: I8a3bfa4582b019c5bc0bcee92795b6b9e69930a8
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5401299


> Reviewed-by: Zufeng Wang <zufeng@google.com>
> Commit-Queue: Callistus Tan <callistus@google.com>
> Cr-Commit-Position: refs/heads/main@{#1279498}

Bug: b/321865996
Bug: b/331766853
Change-Id: I482f0e4f7a44d4e739e7b25ebbd8ae9764c4a107
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5401549


Owners-Override: Yoshiki Iguchi <yoshiki@chromium.org>
Commit-Queue: Yoshiki Iguchi <yoshiki@chromium.org>
Reviewed-by: Zufeng Wang <zufeng@google.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1280184}