Remove unused variables.
Remove unused variables.

herbelin/github-coq,Ptival/coq,SkySkimmer/coq,jpdeplaix/coq,maximedenes/coq,mattam82/coq,Ptival/coq,ppedrot/coq,TheTypoMaster/coq,ejgallego/coq,coq/coq,ppedrot/coq,TOSPIO/coq,Zimmi48/coq,gares/coq,herbelin/github-coq,Lionel-Rieg/coq,william-lawvere/coq,coq/coq,maximedenes/coq,TheTypoMaster/coq,william-lawvere/coq,jpdeplaix/coq,Matafou/coq,SkySkimmer/coq,Zimmi48/coq,JasonGross/coq,ejgallego/coq,ppedrot/coq,coq/coq,TOSPIO/coq,ejgallego/coq,gares/coq,TOSPIO/coq,william-lawvere/coq,Zimmi48/coq,gares/coq,mattam82/coq,TheTypoMaster/coq,gares/coq,Zimmi48/coq,letouzey/coq-wip,barras/coq,Lionel-Rieg/coq,silene/coq,8l/coq,letouzey/coq-wip,barras/coq,amintimany/coq,silene/coq,SkySkimmer/coq,8l/coq,barras/coq,herbelin/github-coq,ppedrot/coq,Matafou/coq,amintimany/coq,silene/coq,Ptival/coq,JasonGross/coq,8l/coq,SkySkimmer/coq,letouzey/coq-wip,maximedenes/coq,maximedenes/coq,coq/coq,amintimany/coq,mattam82/coq,JasonGross/coq,letouzey/coq-wip,letouzey/coq-wip,Lionel-Rieg/coq,ppedrot/coq,gares/coq,JasonGross/coq,jpdeplaix/coq,maximedenes/coq,Matafou/coq,ejgallego/coq