[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 ekmett):

 @dreixel:

 A quick skim of my own projects reveals 100+ locations affected in a way
 that makes them very awkward to patch around with CPP, as they affect
 public APIs and I've currently agreed to maintain many of my packages back
 to ghc 7.4 -- an agreement that will bump to 7.6 upon the release of 7.10,
 etc.

 So as a data point, deleting those 20 lines will cost me personally
 several hundred lines worth of easily-screwed-up support work if it is
 done as part of GHC 7.10.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9639#comment:12>
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