Disable and/or Batch "Check Out" / "Check In" function of documents

We have thousands of users in our database, many of whom decide to "Check Out" documents. Currently we must go through each of these jobs manually, one by one, to check in documents so that we may purge the documents when space becomes limited or retention level has been met. We have thousands of files that are currently "Checked Out". We have a standing policy to never check out documents, as it is not a necessary feature in our use-case and more of a hindrance.