[REM] ecommerce: removed upsell,cross-sell, and promo code

Author: ksc-odoo

ecommerce/maximizing_revenue.rst

@@ -5,11 +5,9 @@ Maximize my revenue
 .. toctree::
    :titlesonly:
 
-   maximizing_revenue/upselling
-   maximizing_revenue/cross_selling
    maximizing_revenue/reviews
    maximizing_revenue/pricing
-   maximizing_revenue/promo_code
+