Delete checkpoint-800/optimizer.bin

Very weird, for some strange reason this checkpoint has bee flagged, but not the others

checkpoint-800/optimizer.bin

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:6d457bd236d9ea37752b19192370ef2dddc663e5f729309f6c9a1a78aa7e1422
-size 14990599