This reverts commit dcac984b.

Reason for revert: broke LR architectures (arm64, ppc64, s390x)

Change-Id: I531d311c9053e81503c8c78d6cf044b318fc828b
Reviewed-on: https://go-review.googlesource.com/99695
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>