[GHC] #9639: Remove OldTypeable

[GHC]

#9639: Remove OldTypeable
-------------------------------------+-------------------------------------
              Reporter:  dreixel     |            Owner:
                  Type:  task        |           Status:  patch
              Priority:  normal      |        Milestone:  7.10.1
             Component:  Compiler    |          Version:  7.9
            Resolution:              |         Keywords:
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Easy (less than 1
       Type of failure:              |  hour)
  None/Unknown                       |       Blocked By:
             Test Case:              |  Related Tickets:
              Blocking:              |
Differential Revisions:  Phab:D311   |
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Comment (by dreixel):

 I don't see what's the issue with `type-eq`. Simply changing the imports
 in `Type.Eq.Poly` and `Type.Eq.Higher` from
 {{{
 import Data.OldTypeable hiding (cast)
 }}}
 to
 {{{
 import Data.Typeable hiding (cast, (:~:))
 }}}
 seems to work.

 If this is the only example we could find on Hackage, I think it's safe to
 go ahead and remove `OldTypeable`.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9639#comment:9>
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