refactor(config_clean): remove unused import from libtofs.jinja

Author: myii

template/config/clean.sls

@@ -5,7 +5,6 @@
 {%- set tplroot = tpldir.split('/')[0] %}
 {%- set sls_service_clean = tplroot ~ '.service.clean' %}
 {%- from tplroot ~ "/map.jinja" import template with context %}
-{%- from tplroot ~ "/libtofs.jinja" import files_switch with context %}
 
 include:
   - {{ sls_service_clean }}