doc/go1.14: remove TODO about Dragonfly passing
doc/go1.14: remove TODO about Dragonfly passing

Both the Dragonfly release and tip builder have been passing for a
while. The net package's interface API is working on both builders since
CL 202317 which has been re-vendored in CL 202438.

Updates #34368
Updates #36878

Change-Id: I187178b3a59f2604187af453207fb4e24a56105c
Reviewed-on: https://go-review.googlesource.com/c/go/+/217358
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

nawawi/go,akutz/go,CAFxX/go,nawawi/go,golang/go,golang/go,CAFxX/go,CAFxX/go,nawawi/go,akutz/go,akutz/go,CAFxX/go,nawawi/go,akutz/go,golang/go,golang/go,golang/go,cloudflare/go,nawawi/go,golang/go,akutz/go,cloudflare/go,CAFxX/go,cloudflare/go,cloudflare/go,akutz/go,akutz/go,akutz/go,golang/go,nawawi/go,CAFxX/go,golang/go,cloudflare/go,CAFxX/go,cloudflare/go,CAFxX/go,nawawi/go,cloudflare/go,cloudflare/go,nawawi/go