[GHC] #11465: Eliminate check_lifted check in TcValidity

[GHC]

#11465: Eliminate check_lifted check in TcValidity
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        Reporter:  simonpj           |                Owner:
            Type:  bug               |               Status:  closed
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  7.10.3
      Resolution:  fixed             |             Keywords:
                                     |  LevityPolymorphism
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1807
       Wiki Page:                    |
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Changes (by simonpj):

 * keywords:   => LevityPolymorphism


Comment:

 Adding a keyword so we can find it when we write a paper about levity
 polymorphism!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11465#comment:12>
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