fix dla xiastek not secure

app.py

@@ -637,12 +637,6 @@ def require_system_password():
 def start_timer():
     request._start_time = time.time()
 
-@app.after_request
-def remove_default_referrer_policy(response):
-    if not app.config.get("REFERRER_POLICY"):
-        response.headers.pop("Referrer-Policy", None)
-    return response
-
 @app.after_request
 def log_request(response):
     if request.path == "/healthcheck":