libnetwork/resolvconf: remove README.md

This information was already documented in the package's GoDoc, so
no need to repeat it.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

libnetwork/resolvconf/README.md

@@ -1 +0,0 @@
-Package resolvconf provides utility code to query and update DNS configuration in /etc/resolv.conf