We only referenced it to disable the feature, but we also disable the
SignedExchangeSubresourcePrefetch one, so we can simply drop that now.
Chromium change:
https://chromium.googlesource.com/chromium/src/+/81c6aac468434ae4b96442ce11745e1ef828da04
commit 81c6aac468434ae4b96442ce11745e1ef828da04
Author: Tsuyoshi Horo <horo@chromium.org>
Date: Tue Sep 21 02:10:28 2021 +0000
Remove SignedExchangePrefetchCacheForNavigations flag
This feature was merged into SignedExchangeSubresourcePrefetch.
Bug: 968427