[GHC] #14324: Consider deprecating STM invariant mechanism

[GHC]

#14324: Consider deprecating STM invariant mechanism
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        Reporter:  bgamari           |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 fryguybob notes that he has a commit removing the feature:
 https://github.com/fryguybob/ghc/commit/38befad8a05406f1c553aba1f5e42929b68eba13

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14324#comment:4>
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