Remove experimental unsized-media policy.
This document policy (previously feature policy) has been in an
experimental state for several years, and there are no current plans to
ship it. Removing the feature to reduce the maintenance burden of unused
code.
Bug: 340920459
Change-Id: If87134afd80b3538a3cb043f92c26758bbc19040
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5544738
Commit-Queue: Ian Clelland iclelland@chromium.org
Reviewed-by: Chris Harrelson chrishtr@chromium.org
Reviewed-by: danakj danakj@chromium.org
Cr-Commit-Position: refs/heads/main@{#1302717}