[dev.link] cmd/link: remove symbol movement workaround in dodata

[dev.link] cmd/link: remove symbol movement workaround in dodata

It is supposed to work around symbol movement in machosymorder.
But machosymorder doesn't actually move symbols around.

Change-Id: Ibdc2ad41aaa8cd49e865088aa1ddb7ab399736cd
Reviewed-on: https://go-review.googlesource.com/c/go/+/230279
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>