made changes to remove old content and update TOC partial to show all headings

Author: Donna-Marie Smith

content/en/docs/2025.3/Guides/cortex-gateway/settings/studio-export.md

@@ -0,0 +1,6 @@
+{{ partial "page-meta-links.html" . }}
+{{ if not .Params.notoc }}
+{{ with .TableOfContents }}
+{{ . }}
+{{ end }}
+{{ end }}