These functions are not defined and are not used.

Fixes #19290

Change-Id: I2978147220af83cf319f7439f076c131870fb9ee
Reviewed-on: https://go-review.googlesource.com/37448Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Dmitry Vyukov <dvyukov@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>