chore: remove flask

backend/requirements.txt

@@ -3,9 +3,6 @@ uvicorn[standard]==0.30.6
 pydantic==2.9.2
 python-multipart==0.0.18
 
-Flask==3.1.0
-Flask-Cors==5.0.0
-
 python-socketio==5.11.3
 python-jose==3.3.0
 passlib[bcrypt]==1.7.4

pyproject.toml

@@ -11,9 +11,6 @@ dependencies = [
     "pydantic==2.9.2",
     "python-multipart==0.0.18",
 
-    "Flask==3.1.0",
-    "Flask-Cors==5.0.0",
-
     "python-socketio==5.11.3",
     "python-jose==3.3.0",
     "passlib[bcrypt]==1.7.4",