[Gardener] Revert "Privacy guide: Show history sync card for signed-in users"

This reverts commit 4a271d33212e1e47c66b41c8a9b3a649cad27dbf.

Reason for revert: Fails on Win10 builds. See failures: https://ci.chromium.org/ui/p/chromium/builders/ci/Win10%20Tests%20x64

Original change's description:
> Privacy guide: Show history sync card for signed-in users
>
> This CL does the following:
> 1. Sets replaceSyncPromosWithSignInPromos in load time data for ChromeOS as well, to allow the tests to pass -> the value will always be false and the tests should already handle that.
> 2. Shows the history sync card for signed in users if
> replaceSyncPromosWithSignInPromos is set.
> 3. Sets the initial toggle value of history sync toggle in the privacy
> guide to only be decided by typedUrlsSynced bit.
>
> Bug: 445673760
> Change-Id: I642b2832ff81db6bbb31d2e5041ca8395c4ba8c8
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6960193
> Commit-Queue: Marc Treib <treib@chromium.org>
> Commit-Queue: Ankush Singh <ankushkush@google.com>
> Auto-Submit: Ankush Singh <ankushkush@google.com>
> Reviewed-by: Marc Treib <treib@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1527444}

Bug: 445673760
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I7fb6dcb20f52f12f0208e4b595c74b06f0eaaa57
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7027056
Auto-Submit: Sana Akbani <sanaakbani@google.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Darryl James <dljames@chromium.org>
Commit-Queue: Darryl James <dljames@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1527671}