[REV] point_of_sale: revert Epson Server Direct Print

This reverts commit b8aa3b9.

Epson Server Direct print support was reverted for 19.1 and so the
documentation is no longer needed

closes #15589

Signed-off-by: Audrey Vandromme (auva) <auva@odoo.com>

Author: Ysoroko

content/applications/sales/point_of_sale/configuration.rst

@@ -92,6 +92,5 @@ settings <configuration/settings>` and choose the specific categories to display
 
    configuration/pos_iot
    configuration/epos_printers
-   configuration/epson_server_direct_print
    configuration/https
    configuration/epos_ssc