Remove hybi sub directory for WebSocket layout tests

LayoutTests/http/tests/websocket/client-close_wsh.py

 import struct
 
 from mod_pywebsocket import msgutil
 from mod_pywebsocket import stream
 
 def web_socket_do_extra_handshake(request):
     pass
 
 
 def web_socket_transfer_data(request):
     # Wait for a close frame sent from the client.
     close_frame = request.ws_stream.receive_bytes(6)
 
     msgutil.send_message(request, 'Client should ignore this message')
 
     # Send only first two bytes of the received frame. The remaining four bytes are
     # "masking key", which changes every time the test runs.
     data = struct.pack('!H', 1000) + 'close_frame[:2]=%r' % close_frame[:2]
     request.connection.write(stream.create_close_frame(data))
 
     # If the following assertion fails, AssertionError will be raised,
     # which will prevent pywebsocket from sending a close frame.
     # In this case, the client will fail to finish closing handshake, thus
     # closeEvent.wasClean will become false.
     assert close_frame[:2] == '\x88\x80'
 
     # Pretend we have received a close frame from the client.
     # After this function exits, pywebsocket will send a close frame automatically.
     request.client_terminated = True