Remove square brackets

Change-Id: I8a6b1b2a60ef3ae41f243a2fdf767ee0554487e8
diff --git a/playbooks/setup-openstack-storpool/pre.yaml b/playbooks/setup-openstack-storpool/pre.yaml
index b5b5b3d..458d8eb 100644
--- a/playbooks/setup-openstack-storpool/pre.yaml
+++ b/playbooks/setup-openstack-storpool/pre.yaml
@@ -346,8 +346,8 @@
       ansible.builtin.command:
         argv: [ "ssh", "-o", "StrictHostKeyChecking=accept-new", "{{ item }}" ]
       loop:
-        - [ "{{ storpool_node_ip }}" ]
-        - [ "{{ openstack_node_ip }}" ]
+        - "{{ storpool_node_ip }}"
+        - "{{ openstack_node_ip }}"
 
     - name: Install python3-pip
       become: true