Revert "loop check with setTimeout"

This reverts commit 718ce9c.

src/plugin/HTMLAudioPlugin/HTMLAudioPlayer.ts

@@ -52,27 +52,15 @@ export class HTMLAudioPlayer extends AudioPlayer {
 					});
 				}
 				if (end != null) {
-					const onEnded: () => void = () => {
-						if (asset.loop) {
-							audio.currentTime = loopStart;
-						} else {
-							audio.pause();
-						}
-					};
-					const setTimer = function(): void {
-						setTimeout(() => {
-							onEnded();
-							setTimer();
-						}, (end - loopStart) * 1000);
-					};
-					// timeupdate イベント通知の精度が低いため、 setTimeout と併用する
-					// addEventListener は裏タブ時にも動作させるため残す
 					audio.addEventListener("timeupdate", () => {
 						if (end <= audio.currentTime) {
-							onEnded();
+							if (asset.loop) {
+								audio.currentTime = loopStart;
+							} else {
+								audio.pause();
+							}
 						}
 					});
-					setTimer();
 				}
 			}