Revert "cmd/go: use platform.MustLinkExternal in externalLinkingForced"
This reverts CL 477395.
Failing on darwin-amd64 builders:
https://build.golang.org/log/
b07ec5e40a896f5d099e4c85f4094321ecc84f21
loadinternal: cannot find runtime/cgo
signal: trace/BPT trap
FAIL crypto/x509 0.024s
FAIL
2023/03/20 12:16:35 Failed: exit status 1
Change-Id: Ib9923f9ff7e24c3b5f8690ba1d6b5d0b6693d49c
Reviewed-on: https://go-review.googlesource.com/c/go/+/477736
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>