Proposal: Remove the bogus MonadFail instance for ST

[Michael Snoyman]

+1, this seems like a good move to me.

On Wed, Mar 14, 2018 at 5:45 AM, David Feuer <david.feuer at gmail.com> wrote:

> I just noted that ST is an instance of MonadFail, with fail throwing
> an error. This seems utterly contrary to the purpose of MonadFail! Can
> we please remove this instance?
>
> David Feuer
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