fix(main): 修复unsloth没有最先导入的问题，删除了重复的导入语句

main.py

@@ -1,5 +1,5 @@
 import gradio as gr
-from frontend.setting_page import setting_page
+import unsloth
 from frontend import *
 from db import initialize_sqlite_db, initialize_prompt_store
 from global_var import init_global_var, get_sql_engine, get_prompt_store