[GHC] #11135: Migrate more of Data.Functor.* from transformers to base.

[GHC]

#11135: Migrate more of Data.Functor.* from transformers to base.
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        Reporter:  hvr               |                Owner:
            Type:  task              |               Status:  upstream
        Priority:  highest           |            Milestone:  8.0.1
       Component:  libraries/base    |              Version:  7.10.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1543
       Wiki Page:                    |  Phab:D1544 Phab:D1630
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Comment (by duairc):

 I understand that. Like I said, I can see why `Eq1`, etc. are useful in
 their own right. But the questions I was really asking are:

 1. Do we care about Haskell 98 compatibility in base?
 2. If not, could I add an instance e.g., `Semigroup (f (g a)) => Semigroup
 (Compose f g a)`? There are a bunch of non-Haskell 98 instances I would
 like to add, especially for `Compose`. Some of these could be made into
 Haskell 98-compatible instances with more `Eq1`-style helper type classes,
 but some could not.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11135#comment:19>
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