Remove ui-tests from README

We’re not using these right now

Signed-off-by: Andy Jakubowski <hello@andyjakubowski.com>

Author: andyjakubowski

README.md

@@ -166,13 +166,6 @@ jlpm
 jlpm test
 ```
 
-#### Integration tests
-
-This extension uses [Playwright](https://playwright.dev/docs/intro) for the integration tests (aka user level tests).
-More precisely, the JupyterLab helper [Galata](https://github.com/jupyterlab/jupyterlab/tree/master/galata) is used to handle testing the extension in JupyterLab.
-
-More information are provided within the [ui-tests](./ui-tests/README.md) README.
-
 ### Packaging the extension
 
 See [RELEASE](RELEASE.md)