Drop special handling of iOS and Android

Authored by angerman on Sep 7 2017, 9:52 PM.

Description

Drop special handling of iOS and Android

As far as GHC is concerned, iOS is Darwin, and
Android is Linux.

Depends on D3352

Reviewers: austin, hvr, bgamari

Reviewed By: bgamari

Subscribers: Ericson2314, ryantrinkle, rwbarton, thomie, erikd

Differential Revision: https://phabricator.haskell.org/D3579