Remove the last use of the Stack module in Tacred.
Remove the last use of the Stack module in Tacred.

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