Simplify Methods#webrat_adapter
Simplify Methods#webrat_adapter

It is unecessary to have a special case for the :rack mode.

brynary/webrat,johnbintz/webrat,jacksonfish/webrat,irfanah/webrat,johnbintz/webrat,irfanah/webrat,m3talsmith/webrat,m3talsmith/webrat,irfanah/webrat,brynary/webrat,jacksonfish/webrat