These templates have been superseded.

If you have used these files for custom templates you should remove them from your /wp-content/themes/{your-active-theme}/woocommerce/ directory:

 - template_list.php
 - template_pick_list.php
 - template_slip.php

Support for these templates will be removed in future versions.

See documentation for custom templates : https://pickingpal.com/woocommerce-pickingpal-documentation/
