Index: doc/papers/concurrency/examples/pingpong.py
===================================================================
--- doc/papers/concurrency/examples/pingpong.py	(revision 17c6c1c38def3a07c82e33193f89279c6e5b5e63)
+++ 	(revision )
@@ -1,26 +1,0 @@
-i = 0
-def pong():
-	global i
-	print( "pong" )
-	if i < 4:
-		yield from ping()
-	print( "stop pong" )
-
-def ping():
-	global i
-	print( "ping" )
-	i += 1
-	if i < 5:
-		yield from pong()
-	print( "stop ping" )
-
-p = ping()
-try:
-	next( p )
-except StopIteration:
-	print( "stop" )
-
-# Local Variables: #
-# tab-width: 4 #
-# compile-command: "python3.5 pingpong.py" #
-# End: #