baremetalds: don't download oc tools outside of dev-scripts

We can rely on dev-scripts to download the tools for us now, so there's
no need to hardcode this URL. The URL we're using here was also removed
from the mirror, so it's causing metal ipi jobs to fail.

ci-operator/step-registry/baremetalds/devscripts/setup/baremetalds-devscripts-setup-commands.sh

@@ -89,8 +89,6 @@ cd dev-scripts
 
 cp /root/pull-secret /root/dev-scripts/pull_secret.json
 
-curl https://mirror.openshift.com/pub/openshift-v4/clients/oc/4.4/linux/oc.tar.gz | tar -C /usr/bin -xzf -
-
 echo "export OPENSHIFT_RELEASE_IMAGE=${OPENSHIFT_INSTALL_RELEASE_IMAGE}" >> /root/dev-scripts/config_root.sh
 echo "export ADDN_DNS=\$(awk '/nameserver/ { print \$2;exit; }' /etc/resolv.conf)" >> /root/dev-scripts/config_root.sh
 echo "export OPENSHIFT_CI=true" >> /root/dev-scripts/config_root.sh