remove dev from Coq dependency

refinedc.opam

@@ -16,7 +16,7 @@ bug-reports: "https://gitlab.mpi-sws.org/iris/refinedc/issues"
 dev-repo: "git+https://gitlab.mpi-sws.org/iris/refinedc.git"
 
 depends: [
-  "coq" { (>= "8.11.0" & < "8.12~") | (= "dev") }
+  "coq" { (>= "8.11.0" & < "8.12~") }
   "coq-iris" { (= "dev.2020-10-01.3.8f6c063a") | (= "dev") }
   "dune" {>= "2.7.0"}
   "cerberus" {= "~dev"}