Remove duplicate definition.
Remove duplicate definition.

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