Update Python version and remove codecov badge

Updated Python version badge and removed codecov badge.

Author: RoryBarnes

README.md

@@ -16,7 +16,7 @@
   <img src="https://github.com/VirtualPlanetaryLaboratory/vspace/actions/workflows/tests.yml/badge.svg">
     <img src="https://img.shields.io/badge/Python-3.6--3.9-orange.svg"></a>
   <a href="https://github.com/VirtualPlanetaryLaboratory/vspace/actions/workflows/pip-install.yml">
-  [![codecov](https://codecov.io/github/VirtualPlanetaryLaboratory/vspace/graph/badge.svg?token=6Z8HVQW8N6)](https://codecov.io/github/VirtualPlanetaryLaboratory/vspace)
+  
   <br>
   <img src="https://github.com/VirtualPlanetaryLaboratory/vspace/actions/workflows/pip-install.yml/badge.svg">
     <img src="https://img.shields.io/badge/Python-3.9--3.13-orange.svg"></a>