ghc: 7.8.3

Starts the process of closing [31609](https://github.com/Homebrew/homebrew/issues/31609). The patches previous in :DATA have been merged with this release and consequently are no longer required. There is also currently no dev build available, so that has been scrapped as well.
This code used to be local to the `resource(binary_resource).stage` block, now they are just here doing nothing (and possibly interfering with later code.