[GHC] #11454: Do not suggest deprecated flags

[GHC]

#11454: Do not suggest deprecated flags
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        Reporter:  thomie            |                Owner:  nkartashov
            Type:  task              |               Status:  closed
        Priority:  normal            |            Milestone:  8.0.1
       Component:  Compiler          |              Version:  7.10.3
      Resolution:  fixed             |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  warning at compile-time            |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1883
       Wiki Page:                    |
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Comment (by thomie):

 Thanks @nkartashov and @bgamari!

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11454#comment:5>
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