gh-135056: Remove some commented out and unused code.

Author: aisipos

Lib/http/server.py

@@ -1036,7 +1036,6 @@ def _main(args=None):
                         help='bind to this port '
                              '(default: %(default)s)')
     parser.add_argument('-H', '--header', nargs=2, action='append',
-                        # metavar='HEADER VALUE',
                         metavar=('HEADER', 'VALUE'),
                         help='Add a custom response header '
                              '(can be used multiple times)')

Lib/test/test_httpservers.py

@@ -1490,15 +1490,7 @@ def test_unknown_flag(self, _):
         self.assertIn('error', stderr.getvalue())
 
     def test_response_headers_arg(self):
-        # with mock.patch.object(
-        #     SimpleHTTPRequestHandler, '__init__'
-        # ) as mock_handler, \
-        # mock.patch.object(
-        #     HTTPServer, 'serve_forever'
-        # ) as mock_serve_forever:
-        with mock.patch.object(
-            HTTPServer, 'serve_forever'
-        ) as mock_serve_forever:
+        with mock.patch.object(HTTPServer, 'serve_forever'):
             httpd = server._main(
                 ['-H', 'Set-Cookie', 'k=v', '-H', 'Set-Cookie', 'k2=v2', '8080']
             )