OCPBUGS#63653: Updated the install config for configuring local node arbiter

Author: sr1kar99

modules/ipi-install-config-local-arbiter-node.adoc

@@ -70,7 +70,6 @@ controlPlane: <4>
   platform:
     baremetal: {}
   replicas: 2 <5>
-featureSet: TechPreviewNoUpgrade
 platform:
   baremetal:
 # ...