refactor(repo): remove unused files_switch import

Author: myii

zabbix/repo.sls

@@ -1,6 +1,4 @@
 {% from "zabbix/map.jinja" import zabbix with context -%}
-{% from "zabbix/macros.jinja" import files_switch with context -%}
-
 
 # Zabbix official repo releases a deb package that sets a zabbix.list apt
 # sources. Here we do the same as that package does, including the PGP key for