Remove old unused build tags from localkube
Remove old unused build tags from localkube

These are being used by github.com/containers/image:

* containers_image_ostree_stub
* containers_image_openpgp

It is not used by minikube anymore, since localkube:

* 5e34247db Use containers/image build tags everywhere
* 57aa3e61a Use the build tags for containers/image everywhere

* 55b41415e Cache images for localkube
* 201e5f9ef Vendor changes

Note that the minikube build tag actually had a typo.

Said "container_image" rather than "containers_image".

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