largefile: use `update_file` instead of `drop` during `rollback`

This is the newer, more semantic API.

Differential Revision: https://phab.mercurial-scm.org/D11192

hgext/largefiles/overrides.py

@@ -1640,7 +1640,9 b' def overriderollback(orig, ui, repo, **o'
                 lfutil.synclfdirstate(repo, lfdirstate, file, True)
                 orphans.discard(file)
             for lfile in orphans:
-                lfdirstate.drop(lfile)
+                lfdirstate.update_file(
+                    lfile, p1_tracked=False, wc_tracked=False
+                )
         lfdirstate.write()
     return result