asyncio: test_selector_events: remove duplicate call to _on_handshake() method

The _SelectorSslTransport constructor already calls it.

Lib/test/test_asyncio/test_selector_events.py

@@ -1089,17 +1089,17 @@ class SelectorSslTransportTests(test_utils.TestCase):
         self.assertIsNone(waiter.result())
 
     def test_on_handshake_reader_retry(self):
+        self.loop.set_debug(False)
         self.sslsock.do_handshake.side_effect = ssl.SSLWantReadError
         transport = _SelectorSslTransport(
             self.loop, self.sock, self.protocol, self.sslcontext)
-        transport._on_handshake(None)
         self.loop.assert_reader(1, transport._on_handshake, None)
 
     def test_on_handshake_writer_retry(self):
+        self.loop.set_debug(False)
         self.sslsock.do_handshake.side_effect = ssl.SSLWantWriteError
         transport = _SelectorSslTransport(
             self.loop, self.sock, self.protocol, self.sslcontext)
-        transport._on_handshake(None)
         self.loop.assert_writer(1, transport._on_handshake, None)
 
     def test_on_handshake_exc(self):
@@ -1120,7 +1120,7 @@ class SelectorSslTransportTests(test_utils.TestCase):
         exc = BaseException()
         self.sslsock.do_handshake.side_effect = exc
         with test_utils.disable_logger():
-            self.assertRaises(BaseException, transport._on_handshake, None)
+            self.assertRaises(BaseException, transport._on_handshake, 0)
         self.assertTrue(self.sslsock.close.called)
         self.assertTrue(transport._waiter.done())
         self.assertIs(exc, transport._waiter.exception())