Don't set logrotate if there's no log to rotate

tasks/main.yml

@@ -32,3 +32,10 @@
     owner: root
     group: root
     mode: 0644
+  when: glrdomon_log_dest != "os.Stdout"
+
+- name: Remove logrotate configuration
+  file:
+    dest: /etc/logrotate.d/gitlab-runner-do-monitor
+    state: absent
+  when: glrdomon_log_dest == "os.Stdout"