Remove supported APIs and Services link from main page

The platform APIs and services page is one of the older pages still
available on the site. As it isn't as important as it may once have been,
remove the direct link from the main page.

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>

content/_index.md

@@ -81,4 +81,3 @@ Apertis provides a number of pre-built images for Intel (64-bit) and ARM (32-bit
 * [Development guides]( {{< ref "guides" >}} )
 * [Design documents]( {{< ref "designs" >}} )
 * [Concept designs]( {{< ref "concepts" >}} )
-* [Supported APIs and Services]( {{< ref "apis-and-services.md" >}} )