Purge old upgrade hooks and unused tasks (#1641)

roles/dnsmasq/tasks/main.yml

@@ -1,6 +1,4 @@
 ---
-- include: pre_upgrade.yml
-
 - name: ensure dnsmasq.d directory exists
   file:
     path: /etc/dnsmasq.d

roles/dnsmasq/tasks/pre_upgrade.yml

@@ -1,9 +0,0 @@
----
-- name: Delete legacy dnsmasq daemonset
-  kube:
-    name: dnsmasq
-    namespace: "{{system_namespace}}"
-    kubectl: "{{bin_dir}}/kubectl"
-    resource: "ds"
-    state: absent
-  when: inventory_hostname == groups['kube-master'][0]