Merge pull request #95625 from openshift-cherrypick-robot/cherry-pick-95597-to-enterprise-4.19

[enterprise-4.19] OCPBUGS-58345 removed a prerequisite

Author: snarayan-redhat

modules/cert-manager-configuring-routes.adoc

@@ -11,7 +11,6 @@ The following steps demonstrate the process of utilizing the {cert-manager-opera
 .Prerequisites
 
 * You have installed version 1.14.0 or later of the {cert-manager-operator}.
-* You have enabled the `RouteExternalCertificate` feature gate.
 * You have the `create` and `update` permissions on the `routes/custom-host` sub-resource.
 * You have a `Service` resource that you want to expose.