largefiles: fix revert on missing largefile (issue3217)

hgext/largefiles/overrides.py

@@ -535,6 +535,8 b' def override_revert(orig, ui, repo, *pat'
             lfutil.lfdirstate_status(lfdirstate, repo, repo['.'].rev())
         for lfile in modified:
             lfutil.updatestandin(repo, lfutil.standin(lfile))
+        for lfile in missing:
+            os.unlink(repo.wjoin(lfutil.standin(lfile)))
 
         try:
             ctx = repo[opts.get('rev')]

tests/test-largefiles.t

@@ -564,6 +564,8 b' Test hg remove removes empty largefiles '
   $ echo hack3 >> normal3
   $ echo hack4 >> sub/normal4
   $ echo hack4 >> sub/large4
+  $ rm sub2/large6
+  $ hg revert sub2/large6
   $ hg rm sub2/large6
   $ echo new >> sub2/large8
   $ hg add --large sub2/large8