don't check for no_proxy, only http/https_proxy. fix linting issues.

roles/vault/tasks/cluster/systemd.yml

@@ -38,7 +38,7 @@
     src: "http-proxy.conf.j2"
     dest: /etc/systemd/system/vault.service.d/http-proxy.conf
     backup: yes
-  when: http_proxy is defined or https_proxy is defined or no_proxy is defined
+  when: http_proxy is defined or https_proxy is defined
 
 - name: cluster/systemd | Enable vault.service
   systemd: