Coq: remove previously generated commented "intros"
Coq: remove previously generated commented "intros"

ssaavedra/why3,douglas-larocca/why3,ssaavedra/why3,jpdeplaix/why3,jpdeplaix/why3,ssaavedra/why3,jpdeplaix/why3,douglas-larocca/why3,douglas-larocca/why3