Disabled IPv6 in an IPv4 database test.

I don't know what the intended behavior of the C library is. The
current and past behaviors are accidental.

Author: oschwald

tests/maxminddb_test.py

@@ -63,13 +63,6 @@ def test_decoder(self):
             record['uint128']
         )
 
-    def test_ipv6_address_in_ipv4_database(self):
-        reader = Reader('tests/data/test-data/MaxMind-DB-test-ipv4-24.mmdb')
-        with self.assertRaisesRegex(ValueError,
-                                    'The value "2001::" is not a valid IP '
-                                    'address.'):
-            reader.get('2001::')
-
     def test_broken_database(self):
         reader = Reader('tests/data/test-data/'
                         'GeoIP2-City-Test-Broken-Double-Format.mmdb')