Use common project repo copies of travis scripts

Remove local copies of common containerd/project located scripts for
DCO, fileheader, and vendor checks.

Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com>

script/setup/install-dev-tools

@@ -23,5 +23,4 @@ set -eu -o pipefail
 go get -u github.com/stevvooe/protobuild
 go get -u github.com/alecthomas/gometalinter
 gometalinter --install >/dev/null
-go get -u github.com/LK4D4/vndr
 go get -u github.com/cpuguy83/go-md2man