Revert "New backtracking based parser for address forms"

This reverts commit f4142537.

Reason for revert: The newly added test is failing on linux-chromeos-chrome:

https://ci.chromium.org/ui/p/chrome/builders/ci/linux-chromeos-chrome/40319/overview

Original change's description:
> New backtracking based parser for address forms
>
> go/autofill-heuristics-with-look-ahead-dd
>
> Bug: 328954153,40279279
> Change-Id: I203589cb9ba296adccdabcecda59ca99c287f14c
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5245526


> Reviewed-by: Matthias Körber <koerber@google.com>
> Commit-Queue: Dominic Battre <battre@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1277266}

Bug: 328954153,40279279
Change-Id: I68c0b348cd94bda30bdb348c16e1c05ae21c9967
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5387896
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Tim Sergeant <tsergeant@chromium.org>
Commit-Queue: Tim Sergeant <tsergeant@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1277419}