remove reasoning models file (temporarily)

Author: msakande

articles/ai-studio/toc.yml

@@ -94,8 +94,6 @@ items:
       items:
         - name: Work with chat completion models
           href: ../ai-foundry/model-inference/how-to/use-chat-completions.md?context=/azure/ai-studio/context/context
-        - name: Work with reasoning models
-          href: ../ai-foundry/model-inference/how-to/use-chat-reasoning.md?context=/azure/ai-studio/context/context
     - name: Work with featured models
       items:
       - name: AI21 Jamba models