diff --git a/demo/1.md b/demo/1.md
deleted file mode 100644
index fbc1284f..00000000
--- a/demo/1.md
+++ /dev/null
@@ -1 +0,0 @@
- ~~<u>**xyz**</u>~~
\ No newline at end of file
diff --git a/mineru/cli/client.py b/mineru/cli/client.py
index 8c73bf1c..813f6d08 100644
--- a/mineru/cli/client.py
+++ b/mineru/cli/client.py
@@ -1,6 +1,5 @@
 # Copyright (c) Opendatalab. All rights reserved.
 import asyncio
-import json
 import os
 import sys
 import threading
@@ -186,10 +185,6 @@ class LiveTaskStatusRenderer:
             self._task_states.clear()
             self.clear_locked()
 
-    def snapshot_lines(self) -> list[str]:
-        with self.sink.lock:
-            return self._build_render_lines_locked()
-
     def clear_locked(self) -> None:
         if self._rendered_line_count <= 0:
             return
@@ -664,29 +659,6 @@ async def submit_task(
     )
 
 
-def submit_task_sync(
-    base_url: str,
-    planned_task: PlannedTask,
-    form_data: dict[str, str | list[str]],
-) -> SubmitResponse:
-    try:
-        return _api_client.submit_parse_task_sync(
-            base_url=base_url,
-            upload_assets=[
-                _api_client.UploadAsset(
-                    path=document.path,
-                    upload_name=f"{document.stem}{document.path.suffix}",
-                )
-                for document in planned_task.documents
-            ],
-            form_data=form_data,
-        )
-    except click.ClickException as exc:
-        raise click.ClickException(
-            f"Failed to submit {format_task_label(planned_task)}: {exc}"
-        ) from exc
-
-
 async def wait_for_task_result(
     client: httpx.AsyncClient,
     submit_response: SubmitResponse,
diff --git a/mineru/cli/fast_api.py b/mineru/cli/fast_api.py
index a047897c..6fc5804d 100644
--- a/mineru/cli/fast_api.py
+++ b/mineru/cli/fast_api.py
@@ -1,7 +1,6 @@
 import asyncio
 import mimetypes
 import os
-import re
 import shutil
 import sys
 import tempfile
@@ -269,19 +268,6 @@ def validate_parse_method(parse_method: str) -> str:
     return parse_method
 
 
-def sanitize_filename(filename: str) -> str:
-    """
-    格式化压缩文件的文件名
-    移除路径遍历字符, 保留 Unicode 字母、数字、._-
-    禁止隐藏文件
-    """
-    sanitized = re.sub(r"[/\\.]{2,}|[/\\]", "", filename)
-    sanitized = re.sub(r"[^\w.-]", "_", sanitized, flags=re.UNICODE)
-    if sanitized.startswith("."):
-        sanitized = "_" + sanitized[1:]
-    return sanitized or "unnamed"
-
-
 def cleanup_file(file_path: str) -> None:
     """清理临时文件或目录"""
     try: