Remove hybi sub directory for WebSocket layout tests

LayoutTests/http/tests/websocket/too-long-payload_wsh.py

 import struct
 import time
 from mod_pywebsocket import common
 
 
 def web_socket_do_extra_handshake(request):
     pass
 
 
 def web_socket_transfer_data(request):
     length = 0x8000000000000000
 
     # pywebsocket refuses to send a frame with too long payload.
     # Thus, we need to build a frame manually.
     header = chr(0x80 | common.OPCODE_TEXT) # 0x80 is for "fin" bit.
     header += chr(127)
     header += struct.pack('!Q', length)
     request.connection.write(header)
 
     # Send data indefinitely to simulate a real (broken) server sending a big frame.
     # A client should ignore these bytes and abort the connection.
     while True:
         request.connection.write('X' * 4096)
         time.sleep(1)