Kill nameSetElems in findImportUsage
Kill nameSetElems in findImportUsage

nameSetElems is nondeterministic and while I think we don't need
determinism here it doesn't hurt.

Test Plan: ./validate

Reviewers: ezyang, bgamari, austin, simonmar

Reviewed By: simonmar

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D2293

GHC Trac Issues: #4012

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