Remove unnecessary constraint on cmdliner

Implied by the OCaml version.

Author: dra27

opam-devel.opam

@@ -28,7 +28,7 @@ build: [
 depends: [
   "ocaml" {>= "4.08.0"}
   "opam-client" {= version}
-  "cmdliner" {>= "0.9.8"}
+  "cmdliner"
   "dune" {>= "2.0.0"}
   "conf-openssl" {with-test}
   "conf-diffutils" {with-test}