rename coroutine

Author: michaelliao

samples/advance/do_prod_cons.py samples/async/coroutine.py

@@ -1,16 +1,13 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-import time
-
 def consumer():
     r = ''
     while True:
         n = yield r
         if not n:
             return
         print('[CONSUMER] Consuming %s...' % n)
-        time.sleep(1)
         r = '200 OK'
 
 def produce(c):