fix:delete comment from string

groovy comments are not supported by bash
so need to delete it from script

Change-Id: I4073d4d273b5d2a2212df3bbfd0789f5419cbd39
diff --git a/src/com/mirantis/mk/Openstack.groovy b/src/com/mirantis/mk/Openstack.groovy
index 6b1c94a..f8a3c33 100644
--- a/src/com/mirantis/mk/Openstack.groovy
+++ b/src/com/mirantis/mk/Openstack.groovy
@@ -75,7 +75,6 @@
 export OS_TENANT_NAME=${project}
 export OS_AUTH_URL=${url}
 export OS_AUTH_STRATEGY=keystone
-//introduce keystone v3 vars
 export OS_PROJECT_NAME=${project}
 export OS_PROJECT_DOMAIN_ID=${project_domain}
 export OS_USER_DOMAIN_ID=${user_domain}