Remove a workaround for building with GHC 6.9
Remove a workaround for building with GHC 6.9

green-haskell/ghc,ml9951/ghc,gridaphobe/ghc,ml9951/ghc,da-x/ghc,sgillespie/ghc,fmthoma/ghc,frantisekfarka/ghc-dsi,shlevy/ghc,frantisekfarka/ghc-dsi,ghc-android/ghc,lukexi/ghc-7.8-arm64,nkaretnikov/ghc,nathyong/microghc-ghc,wxwxwwxxx/ghc,gridaphobe/ghc,nathyong/microghc-ghc,vTurbine/ghc,sdiehl/ghc,wxwxwwxxx/ghc,olsner/ghc,elieux/ghc,frantisekfarka/ghc-dsi,tibbe/ghc,nathyong/microghc-ghc,nathyong/microghc-ghc,sdiehl/ghc,mcschroeder/ghc,ghc-android/ghc,tjakway/ghcjvm,oldmanmike/ghc,nomeata/ghc,TomMD/ghc,nomeata/ghc,TomMD/ghc,acowley/ghc,nomeata/ghc,nushio3/ghc,christiaanb/ghc,gcampax/ghc,da-x/ghc,spacekitteh/smcghc,sgillespie/ghc,TomMD/ghc,holzensp/ghc,shlevy/ghc,holzensp/ghc,tjakway/ghcjvm,ryantm/ghc,mfine/ghc,christiaanb/ghc,acowley/ghc,bitemyapp/ghc,nushio3/ghc,da-x/ghc,anton-dessiatov/ghc,forked-upstream-packages-for-ghcjs/ghc,ezyang/ghc,tibbe/ghc,siddhanathan/ghc,nkaretnikov/ghc,nushio3/ghc,GaloisInc/halvm-ghc,christiaanb/ghc,siddhanathan/ghc,nkaretnikov/ghc,mcschroeder/ghc,vikraman/ghc,fmthoma/ghc,mettekou/ghc,gridaphobe/ghc,ml9951/ghc,hferreiro/replay,siddhanathan/ghc,ryantm/ghc,anton-dessiatov/ghc,ekmett/ghc,jstolarek/ghc,gridaphobe/ghc,AlexanderPankiv/ghc,hferreiro/replay,vTurbine/ghc,siddhanathan/ghc,ml9951/ghc,olsner/ghc,da-x/ghc,acowley/ghc,elieux/ghc,forked-upstream-packages-for-ghcjs/ghc,elieux/ghc,AlexanderPankiv/ghc,sdiehl/ghc,vikraman/ghc,oldmanmike/ghc,anton-dessiatov/ghc,ml9951/ghc,AlexanderPankiv/ghc,nkaretnikov/ghc,vTurbine/ghc,gridaphobe/ghc,snoyberg/ghc,lukexi/ghc,mcschroeder/ghc,GaloisInc/halvm-ghc,nushio3/ghc,vTurbine/ghc,gcampax/ghc,vTurbine/ghc,nathyong/microghc-ghc,mcschroeder/ghc,mfine/ghc,oldmanmike/ghc,jstolarek/ghc,ml9951/ghc,holzensp/ghc,mcschroeder/ghc,ghc-android/ghc,frantisekfarka/ghc-dsi,da-x/ghc,ryantm/ghc,holzensp/ghc,mettekou/ghc,siddhanathan/ghc,wxwxwwxxx/ghc,gcampax/ghc,mfine/ghc,vTurbine/ghc,ezyang/ghc,wxwxwwxxx/ghc,urbanslug/ghc,elieux/ghc,jstolarek/ghc,nomeata/ghc,urbanslug/ghc,GaloisInc/halvm-ghc,olsner/ghc,nushio3/ghc,oldmanmike/ghc,hferreiro/replay,vikraman/ghc,ekmett/ghc,ekmett/ghc,olsner/ghc,ghc-android/ghc,tjakway/ghcjvm,bitemyapp/ghc,ghc-android/ghc,acowley/ghc,TomMD/ghc,fmthoma/ghc,AlexanderPankiv/ghc,shlevy/ghc,AlexanderPankiv/ghc,lukexi/ghc,lukexi/ghc,bitemyapp/ghc,elieux/ghc,shlevy/ghc,wxwxwwxxx/ghc,holzensp/ghc,forked-upstream-packages-for-ghcjs/ghc,mfine/ghc,mcschroeder/ghc,ghc-android/ghc,urbanslug/ghc,shlevy/ghc,GaloisInc/halvm-ghc,lukexi/ghc-7.8-arm64,acowley/ghc,spacekitteh/smcghc,lukexi/ghc-7.8-arm64,jstolarek/ghc,mfine/ghc,fmthoma/ghc,TomMD/ghc,mcschroeder/ghc,sdiehl/ghc,nushio3/ghc,snoyberg/ghc,hferreiro/replay,forked-upstream-packages-for-ghcjs/ghc,da-x/ghc,hferreiro/replay,oldmanmike/ghc,christiaanb/ghc,christiaanb/ghc,sdiehl/ghc,tjakway/ghcjvm,lukexi/ghc,vikraman/ghc,nushio3/ghc,TomMD/ghc,snoyberg/ghc,lukexi/ghc,ryantm/ghc,oldmanmike/ghc,tibbe/ghc,hferreiro/replay,urbanslug/ghc,lukexi/ghc-7.8-arm64,elieux/ghc,nkaretnikov/ghc,tibbe/ghc,olsner/ghc,nkaretnikov/ghc,ezyang/ghc,acowley/ghc,nkaretnikov/ghc,wxwxwwxxx/ghc,spacekitteh/smcghc,lukexi/ghc-7.8-arm64,ml9951/ghc,ekmett/ghc,snoyberg/ghc,mettekou/ghc,ezyang/ghc,vikraman/ghc,shlevy/ghc,anton-dessiatov/ghc,green-haskell/ghc,vikraman/ghc,green-haskell/ghc,GaloisInc/halvm-ghc,spacekitteh/smcghc,tjakway/ghcjvm,vTurbine/ghc,AlexanderPankiv/ghc,GaloisInc/halvm-ghc,sdiehl/ghc,sdiehl/ghc,anton-dessiatov/ghc,tjakway/ghcjvm,ekmett/ghc,gcampax/ghc,mfine/ghc,gridaphobe/ghc,acowley/ghc,ml9951/ghc,mfine/ghc,olsner/ghc,gridaphobe/ghc,shlevy/ghc,TomMD/ghc,fmthoma/ghc,nathyong/microghc-ghc,nathyong/microghc-ghc,tibbe/ghc,fmthoma/ghc,forked-upstream-packages-for-ghcjs/ghc,vikraman/ghc,gcampax/ghc,mettekou/ghc,ezyang/ghc,siddhanathan/ghc,fmthoma/ghc,sgillespie/ghc,wxwxwwxxx/ghc,ezyang/ghc,snoyberg/ghc,green-haskell/ghc,hferreiro/replay,anton-dessiatov/ghc,green-haskell/ghc,spacekitteh/smcghc,sgillespie/ghc,olsner/ghc,christiaanb/ghc,ezyang/ghc,nomeata/ghc,AlexanderPankiv/ghc,elieux/ghc,urbanslug/ghc,mettekou/ghc,bitemyapp/ghc,anton-dessiatov/ghc,sgillespie/ghc,snoyberg/ghc,gcampax/ghc,forked-upstream-packages-for-ghcjs/ghc,sgillespie/ghc,tjakway/ghcjvm,urbanslug/ghc,forked-upstream-packages-for-ghcjs/ghc,da-x/ghc,urbanslug/ghc,ghc-android/ghc,gcampax/ghc,mettekou/ghc,mettekou/ghc,GaloisInc/halvm-ghc,siddhanathan/ghc,oldmanmike/ghc,snoyberg/ghc,ryantm/ghc,jstolarek/ghc,christiaanb/ghc,bitemyapp/ghc,sgillespie/ghc,frantisekfarka/ghc-dsi