Revert "Wayland screencast: add getter for all enumerated devices"

This reverts commit 15d74a5b976c914762b9bf8e45e0d151e5bb31d9.

Reason for revert: Parent CL causes crashes

Original change's description:
> Wayland screencast: add getter for all enumerated devices
>
> Bug: webrtc:461543454
> Change-Id: I629deaf5e8abc8876789b018f1f01651a5125e91
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/428541
> Reviewed-by: Alexander Cooper <alcooper@chromium.org>
> Commit-Queue: Jan Grulich <grulja@gmail.com>
> Cr-Commit-Position: refs/heads/main@{#46558}

Bug: webrtc:461543454
Change-Id: Icbfa38df6d62135820e2a780b97b8f19cb6df7f5
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/440421
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Alexander Cooper <alcooper@chromium.org>
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Owners-Override: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#46574}