Remove unused import.

Author: qiuosier

ads/llm/templates/score_chain.jinja2

@@ -3,7 +3,6 @@ import os
 import sys
 import json
 from functools import lru_cache
-from langchain.chains import LLMChain
 from ads import set_auth
 from ads.llm.deploy import ChainDeployment
 from ads.llm.chain import LOG_ADS_GUARDRAIL_INFO