Revert "Add WPT for Compression Dictionary Transport"

This partially reverts commit f8d14034.

Reason for revert: dictionary-fetch-with-link-* tests are flaky.
First failing run
https://ci.chromium.org/ui/p/chromium/builders/ci/Linux%20Tests%20(dbg)(1)/119589/blamelist

Original change's description:
> Add WPT for Compression Dictionary Transport
>
> Bug: 1413922
> Change-Id: I4f7aad71a043354f5c107a301b66d58a1409ef89
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5401505


> Commit-Queue: Tsuyoshi Horo <horo@chromium.org>
> Reviewed-by: Patrick Meenan <pmeenan@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1281548}

Bug: 1413922
Change-Id: If52e3f9074e51265da65fef08456fc1d42be735a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5418514


Reviewed-by: Fergal Daly <fergal@chromium.org>
Commit-Queue: Tsuyoshi Horo <horo@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1281675}