Garbage Collection for LFS Files

Hey i ran into a question about unused LFS Files,

Because we don’t want to blow up our storage with hundrets of binary LFS file history we tried to squash the commits so that only one commit with the LFS files exist and the history is lost.
I checked in the Repos Settings under LFS and most of the Files under find commit don’t show a commit anymore which is expected.
I tried the Cron Tasks for “clean deleted branches”, “garbage collection for LFS-Meta Data Objects” and “garbage collection for Repository” but all didn’t delete the unused LFS files from history.

Is there a other task to delete these files or is it expected to delete them by hand if needed?