record: drop a now useless overlay that grab the lock

Since 28dfb2df4ab9, commit grab the wlock and the extra layer grabing the lock
in record is no longer needed.

We clean up the code to make this simpler (and add a small assert for extra
security against future change).

mercurial/cmdutil.py

@@ -469,6 +469,7 b' def dorecord('
         In the end we'll record interesting changes, and everything else
         will be left in place, so the user can continue working.
         """
+        assert repo.currentwlock() is not None
         if not opts.get(b'interactive-unshelve'):
             checkunfinished(repo, commit=True)
         wctx = repo[None]
@@ -669,11 +670,7 b' def dorecord('
             except OSError:
                 pass
 
-    def recordinwlock(ui, repo, message, match, opts):
-        with repo.wlock():
-            return recordfunc(ui, repo, message, match, opts)
-
-    return commit(ui, repo, recordinwlock, pats, opts)
+    return commit(ui, repo, recordfunc, pats, opts)
 
 
 class dirnode: