translatewiki-shelllint: Have Zuul fetch git without submodules

This fixes the bug where puppet-validate and shellint randomly
fail depending on whether the jobs execute on gallium or lanthanum.

The problem is that translatewiki.git has submodules from external
repositories on github (not even @wikimedia). By default most
Jenkins slaves are firewalled (except for post-merge jobs for
reviewed commits that sync to doc.wikimedia.org etc.).

This job just performs static analysis (just like phplint and
yamllint, which already inherit from use-remote-zuul-no-submodules)
and doesn't need any submodules to work.

Change-Id: I5ccad65a321636303779813003db9f8fc850c599