Revert "Refactor glic_app_controller.ts into a state machine"

This reverts commit e02ee278eef9045f53f2340ee99e7239cd675d76.

Reason for revert: https://ci.chromium.org/ui/p/chromium/builders/ci/mac14-arm64-rel-tests/16658/overview

Original change's description:
> Refactor glic_app_controller.ts into a state machine
>
> Bug: 379164689
> Change-Id: Ie118f7f3ada6c314b97e972b60bb8cb4164f33ca
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6214291
> Reviewed-by: Dan H <harringtond@chromium.org>
> Reviewed-by: Dana Fried <dfried@chromium.org>
> Commit-Queue: Ian Clelland <iclelland@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1413548}

Bug: 379164689
Change-Id: I13d51506b2c6d57f46ed5a3e460f1cb65b3ef8a0
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6219623
Owners-Override: Francois Pierre Doray <fdoray@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Francois Pierre Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1413611}