Delete all _Pionier Skins, please

My old minecraft account was named _Pionier, but I changed my Name, because someone uploaded weird and stupid skins, with the name _Pionier, thats why I would like them to be deleted, I cant delete them, because they arent mine and I dont want my friends to think Im somebody who makes skins like this, thanks!

Btw I use my Google account to write this, thats why I have this weird name.