Removed `delete_on_close` parameter, because it's since Python 3.12

server.py

@@ -66,12 +66,9 @@ class CheckSignificanceError(Exception):
 
 def check_significance_is_reachable():
     with (
-        tempfile.NamedTemporaryFile(delete_on_close=False) as model_a_fp,
-        tempfile.NamedTemporaryFile(delete_on_close=False) as model_b_fp,
+        tempfile.NamedTemporaryFile() as model_a_fp,
+        tempfile.NamedTemporaryFile() as model_b_fp,
     ):
-        model_a_fp.close()
-        model_b_fp.close()
-        
         model_a_path = model_a_fp.name
         model_b_path = model_b_fp.name