God, this photo. It always makes me think someone attached the wrong size face.
I'll offer another potential reason why this poor guy is shaved; if he's got a condition that needs a topical cream or medicated shampoo or similar, then this guarantees the stuff gets right to the skin, where it's needed. His skin looks fine, but you never can tell with fleas. * tiny rimshot *
Flat faced kitties have a much harder time cleaning themselves so if I had to guess, this was after a sanitary/dematting groom. At least I certainly hope it is.
PSA: Do not buy/adopt flat faced pets without fully knowing what goes into caring for them.