Remove Web APIs tutorial from toc.yml (#36942)

fixes #36941
Removed Web APIs tutorial entry from the table of contents.  It was pointing to an old controller based learn training series.  Minimal API is what should be promoted instead as the starting point.

Author: wadepickett

aspnetcore/toc.yml

@@ -414,9 +414,6 @@ items:
           - name: Web apps >>
             displayName: tutorial, razor, razor pages, ui
             href: /training/modules/create-razor-pages-aspnet-core/
-          - name: Web APIs >>
-            displayName: tutorial
-            href: /training/modules/build-web-api-aspnet-core/
           - name: Cloud-native microservices
             items:
               - name: Create and deploy >>