He hasn't deleted them.
Someone on Twitter said this last night and they are wrong.
Just go on his Twitter. His profile pic is of him at Boro, in a Boro kit.
His profile pick is of him in playing for England and the header is of him by himself at sheff utd
I 'd like to see him as your number 10 next season.. boro social media pics and all! https://twitter.com/morrisonravel