However you can also mute such notifications as suggested by WABetaInfo.
How to delete notifications on WhatsApp
For such a message, you can mute notifications on both Android and iOS platforms. It also works for WhatsApp Web or its desktop clients. To do this, you need to make mute notifications for the member of the group who is responding to any of your old messages.
So to delete notifications for that particular person, you have to go to his / her WhatsApp profile. Then you have to tap the name. Then find the mute notifications option there. It can ask for mute for Android and mute for iOS. To delete notifications here, you can choose from a week to 8 hours, a week or forever.
This is useful when you do not want to leave a group. But at the same time, if you mention someone, you also want to delete their notifications.
WABetaInfo report This will work accordingly even though WhatsApp also implements multi-device support. It can then essentially sync rules across devices.