Patch #2167 from calvin: Remove unused imports
diff --git a/Parser/asdl_c.py b/Parser/asdl_c.py
index 4877853..17d9dfd 100755
--- a/Parser/asdl_c.py
+++ b/Parser/asdl_c.py
@@ -4,7 +4,7 @@
 # TO DO
 # handle fields that have a type but no name
 
-import os, sys, traceback
+import os, sys
 
 import asdl