hack/validate: skip DCO in "default"

We perform a DCO check before we run all other tests, so we can skip it
as part of the validate step.

Leaving the line in for visibility, and in case we switch from Jenkins
to (e.g.) GitHub actions.

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

hack/validate/default

@@ -4,7 +4,8 @@
 
 export SCRIPTDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
-. "${SCRIPTDIR}"/dco
+# Skip DCO check here, as it's already checked in a separate stage in the Jenkinsfile
+#. "${SCRIPTDIR}"/dco
 . "${SCRIPTDIR}"/default-seccomp
 . "${SCRIPTDIR}"/pkg-imports
 . "${SCRIPTDIR}"/swagger