Remove FT callout for prompt caching. We generally support it now.

Author: voutilad

articles/ai-services/openai/how-to/prompt-caching.md

@@ -34,9 +34,6 @@ Currently only the following models support prompt caching with Azure OpenAI:
 - `gpt-4.1-2025-04-14`
 - `gpt-4.1-nano-2025-04-14`
 
-> [!NOTE]
-> Prompt caching is now also available as part of model fine-tuning for `gpt-4o` and `gpt-4o-mini`. Refer to the fine-tuning section of the [pricing page](https://azure.microsoft.com/pricing/details/cognitive-services/openai-service/) for details.
-
 ## API support
 
 Official support for prompt caching was first added in API version `2024-10-01-preview`. At this time, only the o-series model family supports the `cached_tokens` API response parameter.