Remove the instack-undercloud-puppet-lint job

This job got migrated and its playbook deleted. The definition of the
job was left in the repo, so now we have errors on instack-undercloud
check jobs.

Removing the definition to fix the issue.

Depends-On: I87141dc9a8ecbb563c4bd63ea47b179e33166905
Change-Id: Iabf5c6d5e5c7677f9f5c0523daedbef3526f5f53
Closes-Bug: #1734348

zuul.d/zuul-legacy-jobs.yaml

@@ -1581,12 +1581,6 @@
     post-run: playbooks/legacy/infra-puppet-apply-4-centos-7/post.yaml
     nodeset: legacy-centos-7
 
-- job:
-    name: legacy-instack-undercloud-puppet-lint
-    parent: legacy-base
-    run: playbooks/legacy/instack-undercloud-puppet-lint/run.yaml
-    timeout: 1800
-
 - job:
     name: legacy-install-dsvm-dragonflow-kuryr-kubernetes
     parent: legacy-dsvm-base