diff --git a/launchers/macosx/include/traits.hpp b/launchers/macosx/include/traits.hpp
deleted file mode 100644
index e490de95f..000000000
--- a/launchers/macosx/include/traits.hpp
+++ /dev/null
@@ -1,57 +0,0 @@
-#ifndef NEITHER_TRAITS_HPP
-#define NEITHER_TRAITS_HPP
-
-namespace neither {
-
-template<class L, class R>
-struct Either;
-
-template<class T>
-struct Maybe;
-
-template<class L,class...Xs>
-auto isCopyable (L l, Xs...) -> L {
-  return l;
-}
-
-template<class L, class R>
-auto ensureEither ( Either<L,R> const& e) -> Either<L,R> {
-  return e;
-}
-
-template<class L, class R>
-auto ensureEither ( Either<L,R> && e) -> Either<L,R> {
-  return e;
-}
-
-template<class L, class R>
-auto ensureEitherRight ( Either<L,R> const& e, R) -> Either<L, R> {
-  return e;
-}
-
-
-template<class L, class R>
-auto ensureEitherRight ( Either<L,R>&& e, R&&) -> Either<L, R> {
-  return e;
-}
-
-
-template<class L, class R>
-auto ensureEitherLeft ( Either<L,R> const& e, L) -> Either<L, R> {
-  return e;
-}
-
-template<class L, class R>
-auto ensureEitherLeft ( Either<L,R>&& e, L&&  ) -> Either<L, R> {
- return e;
-}
-
-
-template<class T>
-auto ensureMaybe ( Maybe<T> const& e) -> Maybe<T> {
-  return e;
-}
-
-}
-
-#endif