Remove print_program option
Remove print_program option

This option was applied inconsistently based on whether previous build
artifacts existed, and isn't incredibly useful anyway for users of the
language.

Axure/elm-compiler,deadfoxygrandpa/Elm,pairyo/elm-compiler,JoeyEremondi/elm-pattern-effects,mgold/Elm,5outh/Elm,laszlopandy/elm-compiler