Revert "lint: check if CurrentVersion is older than oldest build entry"
Revert "lint: check if CurrentVersion is older than oldest build entry"

This reverts commit 78473e7dab07b4bb923d7c388941307503b7ce12.

This is currently blocked by some apps in fdroiddata being reset to a
broken state.

fdroidtravis/fdroidserver,f-droid/fdroidserver,fdroidtravis/fdroidserver,fdroidtravis/fdroidserver,f-droid/fdroidserver,f-droid/fdroidserver,f-droid/fdroid-server,f-droid/fdroidserver,fdroidtravis/fdroidserver,f-droid/fdroidserver,f-droid/fdroid-server,f-droid/fdroid-server,f-droid/fdroid-server,f-droid/fdroid-server