This reverts commit 5dca2bd7.

Reason for revert: Breaks roll:
https://chromium-review.googlesource.com/c/chromium/src/+/977945

Original change's description:
> Force proper code aligment in wasm serializer.
> 
> Change-Id: Iace7040f7327cbc76e75a0cd7229221c93a9456e
> Reviewed-on: https://chromium-review.googlesource.com/975547
> Reviewed-by: Andreas Haas <ahaas@chromium.org>
> Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@mips.com>
> Cr-Commit-Position: refs/heads/master@{#52174}

TBR=ahaas@chromium.org,ivica.bogosavljevic@mips.com,ivo.markovic@mips.com

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

Change-Id: If8d2b66573b9c39fdf5e6e4faf399ecde7005e6e
Reviewed-on: https://chromium-review.googlesource.com/979532Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52201}