build: remove unnecessary test platform dependence
build: remove unnecessary test platform dependence

An alternative approach is being considerd for more granular platform
dependence for tests.

urbit/urbit,ngzax/urbit,ngzax/urbit,ngzax/urbit,ngzax/urbit,urbit/urbit,ngzax/urbit,ngzax/urbit,urbit/urbit,urbit/urbit,urbit/urbit,urbit/urbit,urbit/urbit,ngzax/urbit