Remove stale README content

README.md

@@ -10,8 +10,6 @@ You can find the container at DockerHub: [stammw / quinn-interop](https://hub.do
 
 ## Directory summary:
 
-* [submodule] quinn: the QUIC implementation
-* [submodule] h3: the HTTP/3 implementation
 * [submodule] quic-interop-runner: the testing application, to test locally
 * quinn-interop: interop application to be deployed into the container
 
@@ -44,23 +42,3 @@ docker build -f Dockerfile  -t stammw/quinn-interop:latest .
 cd quic-interop-runner/
 python3 run.py -d -s quic-go -c quinn
 ```
-
-### Using Vagrant
-
-It's possible that your system doesn't handle the network correctly for the interop tester to work. In this case, a Vagrant box is available:
-
-``` sh
-# Spin up the vagrant box
-vagrant up
-
-# Then, connect to it and start testing
-vagrant ssh
-(cd ../ && docker build -f Dockerfile  -t stammw/quinn-interop:latest .) \
-    && python3 run.py -d -s quic-go -c quinn
-```
-
-When you need to start hacking a bit, this command might be handy:
-
-``` sh
-vagrant rsync-auto
-```