Refine imports slightly
Refine imports slightly

sdiehl/ghc,shlevy/ghc,snoyberg/ghc,sgillespie/ghc,olsner/ghc,olsner/ghc,vTurbine/ghc,snoyberg/ghc,vTurbine/ghc,shlevy/ghc,olsner/ghc,snoyberg/ghc,sdiehl/ghc,mettekou/ghc,sgillespie/ghc,shlevy/ghc,olsner/ghc,olsner/ghc,mettekou/ghc,vTurbine/ghc,vTurbine/ghc,snoyberg/ghc,mettekou/ghc,ezyang/ghc,sdiehl/ghc,sgillespie/ghc,sgillespie/ghc,sgillespie/ghc,sdiehl/ghc,snoyberg/ghc,ezyang/ghc,shlevy/ghc,shlevy/ghc,ezyang/ghc,mettekou/ghc,sgillespie/ghc,sgillespie/ghc,shlevy/ghc,sdiehl/ghc,sdiehl/ghc,mettekou/ghc,olsner/ghc,ezyang/ghc,mettekou/ghc,snoyberg/ghc,mettekou/ghc,vTurbine/ghc,vTurbine/ghc,vTurbine/ghc,olsner/ghc,ezyang/ghc,sdiehl/ghc,shlevy/ghc,snoyberg/ghc,ezyang/ghc,ezyang/ghc