[REM] ecommerce: doc about product availability

Remove unnecessary, straightforward, easy-to-figure out documentation, as part of an effort to clear
out any sort of documentation that is either too easy, too simple,
or already gone over in the tutorial videos. This documentation falls into that category. Hence,
it was removed entirely.

ecommerce/getting_started/product_page.rst

@@ -25,9 +25,7 @@ See how to configure your products from links here below.
 
   * :doc:`../managing_products/variants`
   * :doc:`../../sales/products_prices/taxes`
-  * :doc:`../managing_products/stock`
   * :doc:`../maximizing_revenue/cross_selling`
   * :doc:`../maximizing_revenue/reviews`
   * :doc:`../maximizing_revenue/pricing`
   * :doc:`../../website/optimize/seo`
-

ecommerce/managing_products.rst

@@ -7,6 +7,5 @@ Manage my products
 
    managing_products/multi_images
    managing_products/variants
-   managing_products/stock
    ../../sales/products_prices/products/import
 

ecommerce/managing_products/stock.rst

@@ -1,26 +0,0 @@
----------------------------------
-How to show product availability
----------------------------------
-
-The availability of your products can be shown on the website to reassure your customers.
-
-.. image:: ./media/stock_web.png
-   :align: center
-
-To display this, open the *Sales* tab in the product detail form and select an option in 
-*Availability*.
-
-.. image:: ./media/stock.png
-   :align: center
-
-A custom warning message can be anything related to a stock out, delivery delay, etc.
-
-.. image:: ./media/stock_warning.png
-   :align: center
-
-.. note::
-    This tool does not require the Inventory app to be installed.
-
-.. tip::
-    If one item is no longer sellable, unpublish it from your website. If it comes to
-    one particular product variant, deactivate the variant in the backend (see :doc:`../maximizing_revenue/pricing`).