CorePrep: `canFloat` is dead code
GHC.CoreToStg.Prep.canFloat is only called after having checked allLazyTop. But both check for the same OkToSpec flag and allLazyTop does nothing else -- so canFloat can never succeed. Let's remove it.
GHC.CoreToStg.Prep.canFloat is only called after having checked allLazyTop. But both check for the same OkToSpec flag and allLazyTop does nothing else -- so canFloat can never succeed. Let's remove it.