Revert "Add views for the PaymentsWindowUserConsentDialog"

This reverts commit 2a91add6.

Reason for revert: PaymentWindowUserConsentDialogBrowserTest failures starting with:

https://ci.chromium.org/ui/p/chromium/builders/ci/Mac11%20Tests/26463/overview

Original change's description:
> Add views for the PaymentsWindowUserConsentDialog
>
> This CL adds the view implementation and creation for the
> PaymentsWindowUserConsentDialog, as well as its corresponding browser
> tests. This dialog will be triggered to get user consent for initiating
> a payments window flow, for which we currently only have VCN 3DS.
>
> Mock: https://screenshot.googleplex.com/3CBZNUJ7hvNyBn9
>
> Implementation: https://screenshot.googleplex.com/3qFCx7yRXKGJbRy
>
> Bug: 1517762
> Change-Id: I1fa422faa33ce68f257973347def9cce3f456d2b
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5338589


> Commit-Queue: Vinny Persky <vinnypersky@google.com>
> Reviewed-by: Siyu An <siyua@chromium.org>
> Reviewed-by: Dana Fried <dfried@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1280290}

Bug: 1517762
Change-Id: Ie59ea6d7978392ea1967861e5afc77909244e2e4
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5408256
Owners-Override: Stefan Zager <szager@google.com>
Commit-Queue: Stefan Zager <szager@google.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Stefan Zager <szager@google.com>
Cr-Commit-Position: refs/heads/main@{#1280369}