Remove unused function

src/content.ts

@@ -1598,18 +1598,6 @@ function updateAdFlag() {
     }
 }
 
-function formatTime(seconds) {
-  if(isNaN(seconds)) return
-  const h = Math.floor(seconds / 3600);
-  const m = Math.floor((seconds % 3600) / 60);
-  const s = Math.round(seconds % 60);
-  return [
-    h,
-    m > 9 ? m : (h ? '0' + m : m || '0'),
-    s > 9 ? s : '0' + s
-  ].filter(Boolean).join(':');
-}
-
 function showTimeWithoutSkips(allSponsorTimes): void {
 	let skipDuration = 0;