docs: move sponsorship out of README

README.md

@@ -3,8 +3,6 @@
 Please report any [issues](https://github.com/make-all/tuya-local/issues) and feel free to raise [pull requests](https://github.com/make-all/tuya-local/pulls).
 [Many others](https://github.com/make-all/tuya-local/blob/main/ACKNOWLEDGEMENTS.md) have contributed their help already.
 
-[![BuyMeCoffee](https://www.buymeacoffee.com/assets/img/custom_images/orange_img.png)](https://www.buymeacoffee.com/jasonrumney)
-
 This is a Home Assistant integration to support devices running Tuya
 firmware without going via the Tuya cloud.  Devices are supported
 over WiFi, limited support for devices connected via hubs is available.