Revert "CORS check for prefetched subresource signed exchanges"

This reverts commit 73e22231412bef575cfa5dcbf64dd7e6a35c99e9.

Reason for revert:

Findit ( identified CL at revision 662114 as the
culprit for flakes in the build cycles as shown on:

Sample Failed Build:

Sample Failed Step: content_browsertests on Ubuntu-16.04

Sample Flaky Test: SignedExchangeSubresourcePrefetchBrowserTest/SignedExchangeSubresourcePrefetchBrowserTest.CORS/0

Original change's description:
> CORS check for prefetched subresource signed exchanges
> Bug: 935267
> Change-Id: I453bec48331cdbc203f96ccd3c99168f2f1734d4
> Reviewed-on:
> Commit-Queue: Tsuyoshi Horo <>
> Reviewed-by: Kinuko Yasuda <>
> Reviewed-by: Takashi Toyoshima <>
> Reviewed-by: Kunihiko Sakamoto <>
> Cr-Commit-Position: refs/heads/master@{#662114}

Change-Id: I6ab6df81f0dd0e136e2e07f154f3ac9f26712ae3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 935267
Cr-Commit-Position: refs/heads/master@{#662140}
5 files changed