Revert of [x86] Use AVX in Crankshaft when available. (patchset #1 id:1 of https://codereview.chromium.org/
860003002/)
Reason for revert:
Breaks chromium vista and XP browser tests:
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_vista_rel_ng/builds/23
Original issue's description:
> [x86] Use AVX in Crankshaft when available.
>
> R=verwaest@chromium.org
>
> Committed: https://crrev.com/
622be8f71e70b6ece4ea6a89bcfa1bc4be5e70c1
> Cr-Commit-Position: refs/heads/master@{#26159}
TBR=verwaest@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/
863423002
Cr-Commit-Position: refs/heads/master@{#26230}