Revert "freebsd: try using wait_to_add_keys"

This reverts commit 6eaa9b56018305d75d11d96388a74f0faa9f71a0.

Reason for revert: didn't work.  Is no longer a supported option in packer.

Change-Id: I77dd78e60c1208b914523dc97e0aef998356233a
1 file changed