Update the-stack.md (#1049)

removed link as ES and Kibana are referenced in this page. The link no
longer made sense with the changing of the other page.

Author: georgewallace

get-started/the-stack.md

@@ -9,7 +9,7 @@ mapped_pages:
 
 # The {{stack}}
 
-This section provides an overview of the {{stack}} and its components — powered by [{{es}} and {{kib}}](introduction.md).
+This section provides an overview of the {{stack}} and its components.
 
 $$$kibana-navigation-search$$$
 
@@ -95,4 +95,4 @@ deployment:
 ```
 
 :::{include} /deploy-manage/deploy/_snippets/installation-order.md
-:::
+:::