[GHC] #11477: Remove -Wamp

[GHC]

#11477: Remove -Wamp
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  RolandSenn
            Type:  task              |               Status:  patch
        Priority:  normal            |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  7.10.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Other             |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D4785
       Wiki Page:                    |  Phab:D5296
-------------------------------------+-------------------------------------
Changes (by RolandSenn):

 * status:  new => patch
 * differential:  Phab: D4785 => Phab:D4785 Phab:D5296


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11477#comment:9>
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