odstranenie odohranych kol za den zo statistik

frontend/src/pages/admin/AdminStats.tsx

@@ -23,7 +23,6 @@ interface DailyStats {
   total_players: number;
   unconfirmed_players: number;
   peak_hours: Record<string, number>;
-  rounds_per_day: Record<string, number>;
   pageviews_per_day: Record<string, number>;
   visitors_per_day: Record<string, number>;
   pageviews_per_day_by_device: Record<string, Record<string, number>>;
@@ -169,7 +168,6 @@ export default function AdminStats() {
       <div className={`grid gap-4 ${desktop ? 'grid-cols-2' : 'grid-cols-1'}`}>
         <TimeSeriesChart title="Hry za deň" data={data.games_per_day} />
         <TimeSeriesChart title="Nové registrácie za deň" data={data.players_per_day} />
-        <TimeSeriesChart title="Odohrané kolá za deň" data={data.rounds_per_day} />
         <TimeSeriesChart title="Hodiny s najvyššou aktivitou" data={data.peak_hours} kind="bar" />
       </div>