Revert "runtime: Check LSE support on ARM64 at runtime init"
This reverts CL 610195.
Reason for revert: SIGILL on macOS. See issue #71411.
Updates #69124, #60905.
Fixes #71411.
Change-Id: Ie0624e516dfb32fb13563327bcd7f557e5cba940
Reviewed-on: https://go-review.googlesource.com/c/go/+/644695
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Mauri de Souza Meneguzzo <mauri870@gmail.com>