draw_graph() is removed.

Author: shtaxxx

tests/extension/dataflow_/accadd/dataflow_accadd.py

@@ -25,7 +25,7 @@ def mkMain():
 
     df = dataflow.Dataflow(z, v)
     m = df.to_module('main')
-    df.draw_graph()
+    #df.draw_graph()
 
     return m