[GHC] #7756: Remove warning suppressions from compiler/cmm/CmmCommonBlockElim.hs

[GHC]

#7756: Remove warning suppressions from compiler/cmm/CmmCommonBlockElim.hs
-------------------------------+--------------------------------------------
  Reporter:  bosu              |          Owner:                  
      Type:  task              |         Status:  closed          
  Priority:  normal            |      Milestone:                  
 Component:  Compiler          |        Version:  7.7             
Resolution:  fixed             |       Keywords:                  
        Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
   Failure:  None/Unknown      |     Difficulty:  Unknown         
  Testcase:                    |      Blockedby:                  
  Blocking:                    |        Related:                  
-------------------------------+--------------------------------------------
Changes (by simonpj):

  * difficulty:  => Unknown


Comment:

 I've did the one for `CmmCommonBlockElim`, thanks.  `git am` didn't
 recognise the patch, so I did it myself.

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7756#comment:5>
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