Make asyncio tests run when there's no SSL module (#5196)

Author: 1st1

Lib/test/test_asyncio/functional.py

@@ -5,7 +5,6 @@
 import pprint
 import select
 import socket
-import ssl
 import tempfile
 import threading
 
@@ -146,8 +145,6 @@ def start_tls(self, ssl_context, *,
                   server_side=False,
                   server_hostname=None):
 
-        assert isinstance(ssl_context, ssl.SSLContext)
-
         ssl_sock = ssl_context.wrap_socket(
             self.__sock, server_side=server_side,
             server_hostname=server_hostname,