update

packages/coq/coq.8.8.2/opam

@@ -67,7 +67,6 @@ remove: [
     "%{share}%/emacs/site-lisp/gallina-syntax.el"
   ]
 ]
-extra-files: ["coq.install" "md5=6e8ff2905b5508b143a8acb16e3b5150"]
 url {
   src: "packages/coq/coq.8.8.2"
 }