Revert "net: permit use of Resolver.PreferGo, netgo on Windows and Plan 9"

This reverts CL 400654.

Reason for revert: broke net.TestGoLookupIP on the darwin-amd64-nocgo builder.

Updates #33097.

Change-Id: Idaf94eda88c9d4401e667a4d31c00ce376d91909
Reviewed-on: https://go-review.googlesource.com/c/go/+/401754
Run-TryBot: Bryan Mills <bcmills@google.com>
Auto-Submit: Bryan Mills <bcmills@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
16 files changed
tree: f3d3e4b840b57b8d197933f2ce7597307ee59fad
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. codereview.cfg
  12. CONTRIBUTING.md
  13. CONTRIBUTORS
  14. LICENSE
  15. PATENTS
  16. README.md
  17. SECURITY.md
README.md

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