README.md: remove the warp ad again

related: #18153

Signed-off-by: Christian Brabandt <[email protected]>

Author: chrisbra

README.md

@@ -1,16 +1,3 @@
-<div align="center" markdown="1">
-   <sup>Special thanks for supporting Vim by donating to the <a href="https://iccf-holland.org/">ICCF</a>:</sup>
-   <br>
-   <br>
-   <a href="https://go.warp.dev/vim">
-      <img alt="Warp sponsorship" width="400" src="https://raw.githubusercontent.com/warpdotdev/brand-assets/refs/heads/main/Github/Sponsor/Warp-Github-LG-03.png">
-   </a>
-
-### [Warp, built for coding with multiple AI agents.](https://www.warp.dev/vim)
-[Available for MacOS, Linux, & Windows](https://www.warp.dev/vim)<br>
-</div>
-<hr>
-
 # [![Vim The editor](https://github.com/vim/vim/raw/master/runtime/vimlogo.gif)](https://www.vim.org)
 
 [![Github Build status](https://github.com/vim/vim/workflows/GitHub%20CI/badge.svg)](https://github.com/vim/vim/actions?query=workflow%3A%22GitHub+CI%22)