remove collectd bump

Author: bwestover

data/release-notes/enterprise-server/3-0/20.yml

@@ -9,7 +9,6 @@ sections:
     - Some critical services may not have been available on backend nodes in GHES Cluster.
   changes:
     - An additional outer layer of `gzip` compression when creating a cluster support bundle with `ghe-cluster-suport-bundle` is now turned off by default. This outer compression can optionally be applied with the `ghe-cluster-suport-bundle -c` command line option.
-    - Upgraded collectd to version 5.12.0.
     - We have added extra text to the admin console to remind users about the mobile apps' data collection for experience improvement purposes.
   known_issues:
     - On a freshly set up {% data variables.product.prodname_ghe_server %} without any users, an attacker could create the first admin user.