Clean the logic of general_elim_clause.
Clean the logic of general_elim_clause.

ejgallego/coq,SkySkimmer/coq,ejgallego/coq,Zimmi48/coq,Zimmi48/coq,JasonGross/coq,coq/coq,SkySkimmer/coq,coq/coq,SkySkimmer/coq,Zimmi48/coq,JasonGross/coq,coq/coq,ejgallego/coq,coq/coq,JasonGross/coq,Zimmi48/coq,JasonGross/coq,ejgallego/coq,SkySkimmer/coq