[GHC] #12453: Remove setUnfoldingInfoLazily

[GHC]

#12453: Remove setUnfoldingInfoLazily
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           Reporter:  mpickering     |             Owner:  mpickering
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.0.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 The definition of `setUnfoldingInfoLazily` is exactly the same as
 `setUnfoldingInfo` and is only used in one place, `TcInterface`.

 They were made equivalent in 2010 in
 2ff2497dc374175b8ed81446258baf208d1f3e6e with the commit message.

 {{{
 commit 2ff2497dc374175b8ed81446258baf208d1f3e6e
 Author: Ian Lynagh <igloo at earth.li>  Wed Oct 20 15:37:10 2010
 Committer:      Ian Lynagh <igloo at earth.li>  Wed Oct 20 15:37:10 2010
 Original File:  compiler/basicTypes/IdInfo.lhs

 Don't seq unfoldings
 We generate intermediate unfoldings which are just thrown away, so
 evaluating them is a waste of time.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12453>
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