BZ:1924176 v2-del URL to KCS with probs

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1924176

This is an urgent BZ and this "second swing" at the BZ is
to remove the link to the KCS article that is steering
customers into trouble.

Author: Mike McKiernan

post_installation_configuration/machine-configuration-tasks.adoc

@@ -22,7 +22,7 @@ include::modules/checking-mco-status.adoc[leveloffset=+2]
 
 Tasks in this section let you create `MachineConfig` objects to modify files, systemd unit files, and other operating system features running on {product-title} nodes. For more ideas on working with machine configs, see
  content related to link:https://access.redhat.com/solutions/5307301[changing MTU network settings], link:https://access.redhat.com/solutions/5096731[adding] or
-link:https://access.redhat.com/solutions/4510281[updating] SSH authorized keys, link:https://access.redhat.com/solutions/4518671[replacing DNS nameservers], link:https://access.redhat.com/verify-images-ocp4[verifying image signatures], link:https://access.redhat.com/solutions/4727321[enabling SCTP], and link:https://access.redhat.com/solutions/5170251[configuring iSCSI initiatornames] for {product-title}.
+link:https://access.redhat.com/solutions/4510281[updating] SSH authorized keys, link:https://access.redhat.com/verify-images-ocp4[verifying image signatures], link:https://access.redhat.com/solutions/4727321[enabling SCTP], and link:https://access.redhat.com/solutions/5170251[configuring iSCSI initiatornames] for {product-title}.
 
 {product-title} version 4.7 supports link:https://coreos.github.io/ignition/configuration-v3_2/[Ignition specification version 3.2].  All new machine configs you create going forward should be based on Ignition specification version 3.2.  If you are upgrading your {product-title} cluster, any existing Ignition specification version 2.x machine configs will be translated automatically to specification version 3.2.