Remove Promenade generated volume

The post-refactor integration between promenade
and drydock doesn't require (or support) this
volume

Change-Id: Ieca8c4ada7d2469aea17214a163f86ba67a05577

charts/drydock/templates/deployment.yaml

@@ -64,9 +64,6 @@ spec:
               subPath: policy.yaml
               mountPath: /etc/drydock/policy.yaml
               readOnly: true
-            - name: drydock-bootdata
-              mountPath: /etc/drydock/bootdata
-              readOnly: true
       volumes:
         - name: etc-drydock
           emptyDir: {}
@@ -74,9 +71,5 @@ spec:
           configMap:
             name: drydock-etc
             defaultMode: 0444
-        - name: drydock-bootdata
-          configMap:
-            name: promenade-join-sh
-            defaultMode: 0555
 ...
 {{- end }}