This method is a shallow wrapper around trust.GetNotaryRepository, but
due to its signature resulted in the trust package, and notary dependencies
to become a dependency of the CLI. Consequence of this was that cli-plugins,
which need the cli/command package, would also get notary and its
dependencies as a dependency. It is no longer used, and was deprecated
in 9bc16bbde0.
This patch removes the NotaryClient method from the interface
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
66eb27a487