Remove several calls to Evarutil.new_pure_evar.
Remove several calls to Evarutil.new_pure_evar.

ejgallego/coq,gares/coq,gares/coq,silene/coq,SkySkimmer/coq,coq/coq,coq/coq,Zimmi48/coq,JasonGross/coq,silene/coq,SkySkimmer/coq,Zimmi48/coq,coq/coq,gares/coq,SkySkimmer/coq,ejgallego/coq,gares/coq,SkySkimmer/coq,gares/coq,JasonGross/coq,JasonGross/coq,JasonGross/coq,Zimmi48/coq,ejgallego/coq,silene/coq,Zimmi48/coq,coq/coq,ejgallego/coq