Attempt to re-remove TFASIP page from navigation at source code

Initial attempt here: http://cl/403177580
Removal got overwritten here: http://cl/403239897

PiperOrigin-RevId: 404094017

Author: tensorflower-gardener

site/en/about/_menu_toc.yaml

@@ -5,5 +5,3 @@ toc:
       path: /about/
     - label: "Case studies"
       path: /about/case-studies/
-    - label: "AI Service Partners"
-      path: /partners/