Remove some apparerntly dead TH functions

[Milan Straka]

Hi,

+1.

Cheers,
Milan

> This is a library propsal.  There are a handful of functions in the template-haskell package, module Language.Haskell.TH.Lib, that are defined in that module, but are not used, and are not exported by the main Template Haskell interface Language.Haskell.TH.
> I propose to nuke them. I assume no one is using them (since they are not exported by the main interface), and I'm not keen on the API of rename. Moreover, rename becomes signficantly more compilcated with the advent of view patterns.
> The functions are:
> combine :: [([(Name, Name)], Pat)] -> ([(Name, Name)], [Pat])
>   -- Seems to be a helper for rename
> rename :: Pat -> Q ([(Name, Name)], Pat)
> genpat :: Pat -> Q ((Name -> ExpQ), Pat)
> alpha :: [(Name, Name)] -> Name -> ExpQ
> 
> simpleMatch :: Pat -> Exp -> Match
>   -- This is the most defensible; it's a "smart constructor"
> Deadline 2 weeks.
> http://hackage.haskell.org/trac/ghc/ticket/4423
> Simon
> 

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