🔧 Update sponsors: remove Stainless (#15862)

docs/en/data/sponsors.yml

@@ -45,9 +45,6 @@ silver:
   - url: https://www.svix.com/
     title: Svix - Webhooks as a service
     img: /img/sponsors/svix.svg
-  - url: https://www.stainlessapi.com/?utm_source=fastapi&utm_medium=referral
-    title: Stainless | Generate best-in-class SDKs
-    img: /img/sponsors/stainless.png
   - url: https://www.permit.io/blog/implement-authorization-in-fastapi?utm_source=github&utm_medium=referral&utm_campaign=fastapi
     title: Fine-Grained Authorization for FastAPI
     img: /img/sponsors/permit.png

docs/en/docs/advanced/generate-clients.md

@@ -20,20 +20,6 @@ FastAPI automatically generates **OpenAPI 3.1** specifications, so any tool you
 
 ///
 
-## SDK Generators from FastAPI Sponsors { #sdk-generators-from-fastapi-sponsors }
-
-This section highlights **venture-backed** and **company-supported** solutions from companies that sponsor FastAPI. These products provide **additional features** and **integrations** on top of high-quality generated SDKs.
-
-By ✨ [**sponsoring FastAPI**](https://github.com/sponsors/tiangolo) ✨, these companies help ensure the framework and its **ecosystem** remain healthy and **sustainable**.
-
-Their sponsorship also demonstrates a strong commitment to the FastAPI **community** (you), showing that they care not only about offering a **great service** but also about supporting a **robust and thriving framework**, FastAPI. 🙇
-
-For example, you might want to try:
-
-* [Stainless](https://www.stainless.com/?utm_source=fastapi&utm_medium=referral)
-
-Some of these solutions may also be open source or offer free tiers, so you can try them without a financial commitment. Other commercial SDK generators are available and can be found online. 🤓
-
 ## Create a TypeScript SDK { #create-a-typescript-sdk }
 
 Let's start with a simple FastAPI application: