Remove unused API from Elim.
Remove unused API from Elim.

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