Remove test cases for the Unix socket config setting.

This is mostly something you would want to test in the redis-py project,
not in RQ.  The test cases make it a bit complex to read them and they
falsely suggest something interesting might be going on in them.

tests/test_scripts.py

@@ -3,18 +3,7 @@ if is_python_version((2, 7), (3, 2)):
     from unittest import TestCase
 else:
     from unittest2 import TestCase  # noqa
-from rq.scripts import read_config_file, setup_redis, add_standard_arguments, setup_default_arguments
-
-class uFaking(object):
-    def __init__(self, *faking):
-        for attr in faking:
-            setattr(self, attr, None)
-
-def fake_args():
-    return uFaking('host', 'port', 'url', 'socket', 'db', 'queues', 'password')
-
-def conf_pair(**faked_settings):
-    return faked_settings, fake_args()
+from rq.scripts import read_config_file
 
 
 class TestScripts(TestCase):
@@ -22,34 +11,3 @@ class TestScripts(TestCase):
         settings = read_config_file("tests.dummy_settings")
         self.assertIn("REDIS_HOST", settings)
         self.assertEqual(settings['REDIS_HOST'], "testhost.example.com")
-
-    def test_socket_from_module(self):
-        settings, args = conf_pair(REDIS_SOCKET='dummy')
-        setup_default_arguments(args, settings)
-        self.assertEqual(args.socket, 'dummy')
-
-    def test_socket_from_args(self):
-        settings, args = conf_pair(REDIS_SOCKET='sock-read-from-config')
-        args.socket = 'sock-from-arg'
-        setup_default_arguments(args, settings)
-        self.assertEqual(args.socket, 'sock-from-arg')
-
-    def test_add_socket_argument(self):
-        caught = []
-
-        args = uFaking()
-        args.add_argument = lambda *args, **kw: caught.append(args)
-
-        add_standard_arguments(args)
-        socket_parms = [e for e in caught if e[0] == '--socket']
-        self.assertEqual([('--socket', '-s')], socket_parms)
-
-    def test_redis_socket_whiteboxish(self):
-        args = fake_args()
-        args.socket = '/no/such/path'
-        setup_redis(args)
-
-        from rq import connections
-        conn = connections.pop_connection()
-        from redis.connection import UnixDomainSocketConnection
-        self.assertEqual(conn.connection_pool.connection_kwargs['path'], '/no/such/path')