manifest: remove redundant sorted() call for --all

repo.store.datafiles() is now already sorted (for all types of stores).

A follow-up to 4cbb1137941d.

mercurial/commands.py

@@ -4177,7 +4177,7 b' def manifest(ui, repo, node=None, rev=No'
                     res.append(fn[plen:-slen])
         finally:
             lock.release()
-        for f in sorted(res):
+        for f in res:
             ui.write("%s\n" % f)
         return