Drop unneeded CPP directives
Drop unneeded CPP directives

sol/aeson,abbradar/aeson,neobrain/aeson,sol/aeson,lykahb/aeson,dmjio/aeson,aelve/json-x,roelvandijk/aeson,nurpax/aeson,23Skidoo/aeson,timmytofu/aeson,plaprade/aeson,beni55/aeson,neobrain/aeson,JPMoresmau/aeson,sol/aeson,bwo/aeson,roelvandijk/aeson,jkarni/aeson,SeanRBurton/aeson