remove unused delete of temporary files

linux/debian/install-postfix-exporter.yml

@@ -19,10 +19,6 @@
         name: postfix_exporter
         enabled: yes
         state: started
-    - name: delete temporary files
-      file:
-        path: /tmp/postfix_exporter*
-        state: absent
     - name: check node-exporter status
       uri:
         url: http://localhost:9154/metrics