Revert "Add test for transport-cc messages when CCFB is in use"

This reverts commit 32e68fcc6f3752aa0ac3f42f2c2f3729f04529b0.

Reason for revert: Reason for revert: Reverting https://webrtc-review.googlesource.com/c/src/+/396640 to investigate a downstream issue. This CL depends on https://webrtc-review.googlesource.com/c/src/+/396640 so to have a clean revert let's revert this one as well.

Bug: webrtc:383078466
Original change's description:
> Add test for transport-cc messages when CCFB is in use
>
> This verifies that earlier changes do prevent transport-cc
> messages from being generated.
>
> Bug: webrtc:383078466
> Change-Id: I83dd306a8d656ec698d92f6d0a5e3bef7c161a3a
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/372220
> Commit-Queue: Harald Alvestrand <hta@webrtc.org>
> Reviewed-by: Per Kjellander <perkj@webrtc.org>
> Cr-Commit-Position: refs/heads/main@{#44952}

Bug: webrtc:383078466, b/425662432, b/426394283
Change-Id: I52743f6015323207b2e0e2926050451cd64c13a5
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/397781
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Owners-Override: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Christoffer Dewerin <jansson@webrtc.org>
Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#45002}