Revert "feat: add CI and Codecov badges to README and set up Codecov integrat…" (#17)

This reverts commit d6b0f20.

Author: jamesbhobbs

README.md

@@ -1,8 +1,5 @@
 # jupyterlab_deepnote
 
-[![CI](https://github.com/deepnote/jupyterlab-deepnote/actions/workflows/ci.yml/badge.svg?branch=main)](https://github.com/deepnote/jupyterlab-deepnote/actions/workflows/ci.yml)
-[![codecov](https://codecov.io/gh/deepnote/jupyterlab-deepnote/graph/badge.svg?token=OV32VZNOJ2)](https://codecov.io/gh/deepnote/jupyterlab-deepnote)
-
 A Deepnote extension for JupyterLab
 
 This extension is composed of a Python package named `jupyterlab_deepnote`