Ansible launcher: Remove unused plugins dir
Ansible launcher: Remove unused plugins dir

This was being set up in the jobdir, but not used.

Change-Id: I44017b0f2bbcabe4d5fde98f68c299f5f0d7247f

gooddata/zuul,gooddata/zuul,wikimedia/integration-zuul,gooddata/zuul,wikimedia/integration-zuul,wikimedia/integration-zuul,gooddata/zuul,wikimedia/integration-zuul,gooddata/zuul