Virtual method only xors

I need help with reverse engineering a virtual method. The method is as is:

sub_92D110    proc near
xor al, al
retn
sub_92d110    endp

This method is referenced between a lot of classes, even multiple times inside of a vtable of 1 class. I am not sure what it does, does it mean the method got inlined but the call remains so that the vtables retain their size?

And if so, what does xor al, al do? If i'm missunderstanding a call convention or something.

Any insight would be helpful :)