Dead code elimination.
Dead code elimination.

Authored-by: Paul Cavallaro <5a5160191638c3bd554f883f6d94b8e25ffc5e61@fb.com>
Signed-off-by: Austin Seipp <48c905ac3851f382b914247d97dd93273d5ff555@pobox.com>

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