Messaage componeent: Can I remove mouseenter event ?

In my project, mouseEnter needn't reset clock, but I remove it by it's instence,it not work; code id behind, how can i do it?

// 避免鼠标悬浮造成不关闭
setTimeout(function () {
// the dom get is success
let dom = messageInstance.$el;
dom.removeEventListener('mouseenter', messageInstance.clearTimer);
dom.removeEventListener('mouseleave', messageInstance.startTimer);
}, 10)