Remove CodeFund as they are no longer sponsoring
MODIFY
README.rst
README.rst
.. raw:: html
-
- <p align="center">
- <a href="https://codefund.io/properties/451/visit-sponsor">
- <img src="https://codefund.io/properties/451/sponsor" />
- </a>
- </p>
<p align="center">
<a href="https://github.com/urllib3/urllib3">
<img src="./docs/images/banner.svg" width="60%" alt="urllib3" />

Remove CodeFund as they are no longer sponsoring