title: git lfs "objects" taking a lot of disk space
body: <p>I have a project with a lot of binaries (mostly pdfs) that I'm using git-lfs with.  The project is about 60mb but I found that my .git/lfs/objects director is about 500mb.  I presume these are cached versions of previous commits.  Is there a way to gracefully delete these (ie delete them without corrupting the state of git)?  The odds of me ever wanting previous versions of the files in LFS are near 0 now especially since the project is over.</p>