Fix tournament cart fee calculation logic

tournaments/services/tournament_registration.py

@@ -173,11 +173,10 @@ class RegistrationCartManager:
         except Tournament.DoesNotExist:
             return 0
 
-        players = self.session.get('registration_cart_players', []),
+        players = self.session.get('registration_cart_players', [])
         entry_fee = tournament.entry_fee
         if entry_fee is not None and entry_fee > 0 and tournament.enable_online_payment:
             fee = entry_fee * tournament.minimum_player_per_team
-            players = self.session.get('registration_cart_players', [])
             club_members = sum(1 for player in players if player.get('club_member', False))
             if tournament.club_member_fee_deduction is not None:
                 return fee - club_members * tournament.club_member_fee_deduction