I think it's can't be done becouse I tried a number of trick but there's no one trick which worked. So be careful while using any trick there's a number of fraud
I have tried changing time on Android for deleting the message and also tried some third party apps but it is not possible to delete previously sent message on whatsapp
just to confirm I will be joining you tomorrow morning and the rest as well I hope you will let him by the grace and they love me again so that we all have not been worried about dollars