test: Remove Fedora 22 image stragglers
test: Remove Fedora 22 image stragglers

We still do have some things like IPA and CandlePIN images being
built on Fedora 22. In addition our stock image is an old Fedora 22

But we don't need this link.

Closes #5011
Reviewed-by: Peter <a316049dd34607c62d4611d63ab22a6454add223@redhat.com>

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