standard: drop rm of /usr/bin/dotlockfile

Dusty Maberequested to merge
dustymabe/fedora-bootc-base-images:dusty-dotlockfile into main

s390utils dropped the liblockfile dependency a while ago so we can drop this.

https://github.com/coreos/fedora-coreos-tracker/issues/1253#issuecomment-1212056339

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