Disable polling in build history

frontend/src/App.svelte

@@ -80,12 +80,10 @@
 
         const pricesInterval = setInterval(fetchPrices, 8000);
         const ciInterval = setInterval(fetchCiStatus, 10000);
-        const historyInterval = setInterval(fetchBuildHistory, 15000);
 
         return () => {
             clearInterval(pricesInterval);
             clearInterval(ciInterval);
-            clearInterval(historyInterval);
         };
     });
 </script>