removed irrelevant comments

roles/docker/vars/redhat.yml

@@ -11,9 +11,7 @@ docker_versioned_pkg:
   'edge':  docker-engine-17.03.0.ce-1.el7.centos
 
 # https://docs.docker.com/engine/installation/linux/centos/#install-from-a-package
-# https://download.docker.com/linux/centos/7/x86_64/stable/Packages/ - guesses
-  # 'stable': docker-ce-17.03.0.el7.centos
-  # 'edge': docker-ce-17.03.0.el7.centos
+# https://download.docker.com/linux/centos/7/x86_64/stable/Packages/
 
 docker_package_info:
   pkg_mgr: yum