configure.ac: cleanup: remove unused 'HaveLibDL' subst
configure.ac: cleanup: remove unused 'HaveLibDL' subst

Signed-off-by: Sergei Trofimovich <110fdadc76b6bce16977f568bdb4723eaed6fb3f@gentoo.org>

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