I don't want to see DP of a particular contact on Whatsapp
Try this out. To summarize the steps in the link:


Resize the pic you want to use to 561×561.
Save it in /sdcard/WhatsApp/Profile Pictures on your phone.
Then rename it to your friend's phone number, including country code first. (If Jenny lived in Manhattan, her filename would be 12128675309.jpg)
Reopen WhatsApp and the picture should be there.