remove useless serpent import

Jan Xie · Jan Xie · commit 46775e036633 · 2017-02-14T21:40:23.000+08:00
diff --git a/ethereum/state_transition.py b/ethereum/state_transition.py
@@ -1,6 +1,5 @@
 import os
 import rlp
-import serpent
 
 from ethereum.utils import normalize_address, hash32, trie_root, \
     big_endian_int, address, int256, encode_int, \
