Update toc.yml

remove redirected topic

Author: dekadays

articles/cost-management-billing/reservations/toc.yml

@@ -36,8 +36,6 @@
       href: /azure/cosmos-db/postgresql/resources-pricing?toc=/azure/cost-management-billing/reservations/toc.json
     - name: Azure Database for PostgreSQL
       href: /azure/postgresql/single-server/concept-reserved-pricing?toc=/azure/cost-management-billing/reservations/toc.json
-    - name: Azure OpenAI
-      href: azure-openai.md
     - name: Azure AI Foundry 
       href: azure-ai-foundry.md
     - name: Azure SQL Edge