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This reverts commit 1e31ca06.

Reason for revert: v41 is going to be deprecated

Original change's description:
> Enable QUIC v41 by default
> 
> Change-Id: I12c2ce5551bcd2630af75ac9e9f6e15758c3a7e6
> Reviewed-on: https://chromium-review.googlesource.com/889639
> Commit-Queue: Ryan Hamilton <rch@chromium.org>
> Reviewed-by: Buck Krasic <ckrasic@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#532785}

TBR=rch@chromium.org,ckrasic@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: I932329a83dc70e7da7ba8750a87e4e7e71cd544a
Reviewed-on: https://chromium-review.googlesource.com/900102Reviewed-by: Ryan Hamilton <rch@chromium.org>
Reviewed-by: Jana Iyengar <jri@chromium.org>
Commit-Queue: Ryan Hamilton <rch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#534208}