Remove unnecessary how to from TOC.yml

Author: pjw711

articles/operator-nexus/TOC.yml

@@ -285,8 +285,6 @@
           href: howto-kubernetes-cluster-install-microsoft-defender.md
         - name: Kubernetes cluster features
           href: howto-kubernetes-cluster-features.md
-        - name: Place a nexus-volume Persistent Volume on a Specific Storage Appliance
-          href: howto-specify-nexus-volume-storage-appliance.md
 
     - name: Nexus Virtual Machine
       expanded: false