remove useless import: itertools

hit9 · hit9 · commit d7cc98f9d90f · 2025-09-20T17:14:32.000+08:00
diff --git a/compiler/bitproto/utils.py b/compiler/bitproto/utils.py
@@ -1,4 +1,3 @@
-import itertools
 import os
 import re
 import sys
