Remove instance PluckError e (Except e) m
#9
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The presence of this instance causes overlapping instance errors when trying to hoist `ExceptT e m a` values for unknown `m`. `Except e` is an alias for `ExceptT e Identity`, is isomorphic to `Either e`, and I don't think I've ever seen it in production code.
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The presence of this instance causes overlapping instance errors when trying to hoist
ExceptT e m avalues for unknownm.Except eis an alias forExceptT e Identity, is isomorphic toEither e, and I don't think I've ever seen it in production code.