removing unused package and matplotlib dependency.

zt_backend/main.py

@@ -11,7 +11,6 @@
 import webbrowser
 import logging
 import traceback
-import matplotlib
 
 app = FastAPI()
 logger = logging.getLogger("__name__")
@@ -39,7 +38,13 @@
 @app.on_event("startup")
 def open_project():
     try:
+        import matplotlib
         matplotlib.use("Agg")
+    except Exception as e:
+        logger.info('matplotlib not found')
+    try:
+
+
         notebook_path = Path(settings.zt_path) / "notebook.ztnb"
         if not notebook_path.exists():
             logger.info("No notebook file found, creating with empty notebook")

zt_backend/router.py

@@ -52,7 +52,6 @@
 from typing import Optional
 import mimetypes
 from typing import Dict, Tuple, Optional
-import aiofiles
 import tempfile
 from zt_backend.utils.file_utils import *
 

zt_backend/utils/file_utils.py

@@ -4,7 +4,6 @@
 from typing import Dict, Optional, Tuple
 from fastapi import HTTPException
 from pathlib import Path
-import aiofiles
 import os
 from pathlib import Path
 from typing import Dict, Set, AsyncGenerator