Remove traces of MacOS9 support.

Fix for issue #7908
diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index 76d870b..25025dd 100644
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -1465,9 +1465,7 @@
 
 def test_main():
     tests = [GeneralModuleTests, BasicTCPTest, TCPCloserTest, TCPTimeoutTest,
-             TestExceptions, BufferIOTest, BasicTCPTest2]
-    if sys.platform != 'mac':
-        tests.extend([ BasicUDPTest, UDPTimeoutTest ])
+             TestExceptions, BufferIOTest, BasicTCPTest2, BasicUDPTest, UDPTimeoutTest ]
 
     tests.extend([
         NonBlockingTCPTests,