[GHC] #10935: More unused and non-deprecated warning flags

[GHC]

#10935: More unused and non-deprecated warning flags
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        Reporter:  osa1              |                Owner:
            Type:  task              |               Status:  new
        Priority:  lowest            |            Milestone:
       Component:  Compiler          |              Version:  7.10.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #10752            |  Differential Rev(s):
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Comment (by osa1):

 EDIT: It seems like I forgot to search in the lexer. Current status:

 - -fwarn-monomorphism-restriction is unused.
 - -fwarn-alternative-layout-rule-transitional is used in the lexer but not
 documented anywhere.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10935#comment:1>
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