Revert "Temporarily remove zuul-cloner before tarball"

This reverts commit 999f023047.

Merge this change after I8f88cb8d1e49255d38c2c75dd226b3027779aa9e
is available on workers.

Change-Id: Iddfa63d042e49bad3d62c64c33c3b176b8600ad0
Depends-On: I8f88cb8d1e49255d38c2c75dd226b3027779aa9e

jenkins/jobs/python-jobs.yaml

@@ -307,14 +307,8 @@
     node: 'bare-precise || bare-trusty'
 
     builders:
-      - gerrit-git-prep
-      # TODO(jeblair): Remove after
-      # https://review.openstack.org/195184 is merged and available on
-      # workers
-      - shell: |
-          #!/bin/bash -xe
-          sudo rm -rf /usr/zuul-env
       - revoke-sudo
+      - gerrit-git-prep
       - tarball
 
     publishers: