Remove unnecessary ordering restriction from prop_listRegisteredPools.

The `listRegisteredPools` operation doesn't guarantee to list pools in
any particular order, so our property tests also shouldn't require any
particular order.

lib/core/test/unit/Cardano/Pool/DB/Properties.hs

@@ -911,7 +911,7 @@ prop_listRegisteredPools DBLayer {..} entries =
         monitor $ counterexample $ unlines
             [ "Read from DB: " <> show pools
             ]
-        assert (pools == (view #poolId <$> reverse entries))
+        assert (Set.fromList pools == Set.fromList (view #poolId <$> entries))
 
 -- | Test that `listRetiredPools` returns the correct set of retirements for
 --   any given epoch.