docs: don't mention Docker container based tests

Those aren't working yet and are being worked on
close #1605

test/README.md

@@ -8,7 +8,6 @@ You need [python 3.9](https://www.python.org/) and [pip](https://pip.pypa.io/en/
 
     pip install -r requirements/python-requirements.txt
 
-If you can't install those requirements on your computer, you can alternatively use the _pytest.sh_ script which will run the tests from a Docker container which has those requirements.
 
 
 Prepare the nginx-proxy test image
@@ -99,4 +98,4 @@ When you run the `make build-webserver` command, you built a [`web`](requirement
 
 ### Testing TLS
 
-If you need to create server certificates, use the [`certs/create_server_certificate.sh`](certs/) script. Pytest will be able to validate any certificate issued from this script.
+If you need to create server certificates, use the [`certs/create_server_certificate.sh`](certs/) script. Pytest will be able to validate any certificate issued from this script.