Cleanup redundant conditions

Signed-off-by: tu1h <lihai.tu@daocloud.io>

roles/k3s_server/tasks/main.yml

@@ -175,9 +175,7 @@
     - inventory_hostname != groups[server_group][0]
   block:
     - name: Copy K3s service file [HA]
-      when:
-        - groups[server_group] | length > 1
-        - not use_external_database
+      when: not use_external_database
       ansible.builtin.template:
         src: "k3s-ha.service.j2"
         dest: "{{ systemd_dir }}/k3s.service"
@@ -187,9 +185,7 @@
       register: service_file_ha
 
     - name: Copy K3s service file [External DB]
-      when:
-        - groups[server_group] | length > 1
-        - use_external_database
+      when: use_external_database
       ansible.builtin.template:
         src: "k3s-single.service.j2"
         dest: "{{ systemd_dir }}/k3s.service"