Remove unused depdendencies from vendor

Signed-off-by: Daniel Nephin <dnephin@docker.com>

vendor.conf

@@ -6,21 +6,19 @@ github.com/davecgh/go-spew 346938d642f2ec3594ed81d874461961cd0faa76
 github.com/docker/distribution edc3ab29cdff8694dd6feb85cfeb4b5f1b38ed9c
 github.com/docker/docker 184cea5ff710abde25547749e5608b24a255ba09 
 github.com/docker/docker-credential-helpers v0.5.1
-github.com/docker/go-connections 3ede32e2033de7505e6500d6c868c2b9ed9f169d
 
 # the docker/go package contains a customized version of canonical/json
 # and is used by Notary. The package is periodically rebased on current Go versions.
 github.com/docker/go d30aec9fd63c35133f8f79c3412ad91a3b08be06
+github.com/docker/go-connections 3ede32e2033de7505e6500d6c868c2b9ed9f169d
 github.com/docker/go-events 9461782956ad83b30282bf90e31fa6a70c255ba9
 github.com/docker/go-units 9e638d38cf6977a37a8ea0078f3ee75a7cdb2dd1
-github.com/docker/libnetwork 19ac3ea7f52bb46e0eb10669756cdae0c441a5b1 
 github.com/docker/libtrust 9cbd2a1374f46905c68a4eb3694a130610adc62a
 github.com/docker/notary v0.4.2-sirupsen https://github.com/simonferquel/notary.git
 github.com/docker/swarmkit 0554c9bc9a485025e89b8e5c2c1f0d75961906a2
 github.com/flynn-archive/go-shlex 3f9db97f856818214da2e1057f8ad84803971cff
 github.com/gogo/protobuf v0.4
 github.com/golang/protobuf 7a211bcf3bce0e3f1d74f9894916e6f116ae83b4
-github.com/google/certificate-transparency 0f6e3d1d1ba4d03fdaab7cd716f36255c2e48341
 github.com/gorilla/context v1.1
 github.com/gorilla/mux v1.1
 github.com/gotestyourself/gotestyourself v1.0.0