remove Spatie sponsor

Author: mastashake08

README.md

@@ -6,13 +6,6 @@
 [![Total Downloads](https://img.shields.io/packagist/dt/mastashake08/laravel-openai-api.svg?style=flat-square)](https://packagist.org/packages/mastashake08/laravel-openai-api)
 
 
-## Support us
-
-[<img src="https://github-ads.s3.eu-central-1.amazonaws.com/laravel-openai-api.jpg?t=1" width="419px" />](https://spatie.be/github-ad-click/laravel-openai-api)
-
-We invest a lot of resources into creating [best in class open source packages](https://spatie.be/open-source). You can support us by [buying one of our paid products](https://spatie.be/open-source/support-us).
-
-We highly appreciate you sending us a postcard from your hometown, mentioning which of our package(s) you are using. You'll find our address on [our contact page](https://spatie.be/about-us). We publish all received postcards on [our virtual postcard wall](https://spatie.be/open-source/postcards).
 
 ## Installation