simplify build.fsx (#550)
simplify build.fsx (#550)

* simplify build.fs

* simplify build.fs
tpetricek/FSharp.Formatting,tpetricek/FSharp.Formatting,tpetricek/FSharp.Formatting,tpetricek/FSharp.Formatting,tpetricek/FSharp.Formatting,tpetricek/FSharp.Formatting