Remove todo about lazy variables
Remove todo about lazy variables

I wrote that without knowing the full power of attributed variables.
They can be used for doing lazy computation and they're fairly widely
supported among other Prolog implementations.

bransorem/golog,samuell/golog,samuell/golog,mndrix/golog,vzaramel/golog,mndrix/golog,vzaramel/golog,bransorem/golog