Remove Vagrant due to bit-rot. (#20000)

util/vagrant/Dockerfile

@@ -1,33 +0,0 @@
-FROM qmkfm/qmk_cli
-
-# Basic upgrades; install sudo and SSH.
-RUN apt-get update && apt-get install --no-install-recommends -y \
-        sudo \
-        openssh-server \
-    && rm -rf /var/lib/apt/lists/*
-RUN mkdir /var/run/sshd
-RUN sed -i 's/PermitRootLogin yes/PermitRootLogin no/' /etc/ssh/sshd_config
-RUN echo 'UseDNS no' >> /etc/ssh/sshd_config
-
-# Remove the policy file once we're finished installing software.
-# This allows invoke-rc.d and friends to work as expected.
-RUN rm /usr/sbin/policy-rc.d
-
-# Add the Vagrant user and necessary passwords.
-RUN groupadd vagrant
-RUN useradd -c "Vagrant" -g vagrant -d /home/vagrant -m -s /bin/bash vagrant
-RUN echo 'root:vagrant' | chpasswd
-RUN echo 'vagrant:vagrant' | chpasswd
-
-# Allow the vagrant user to use sudo without a password.
-RUN echo 'vagrant ALL=(ALL) NOPASSWD: ALL' > /etc/sudoers.d/vagrant
-
-# Install Vagrant's insecure public key so provisioning and 'vagrant ssh' work.
-RUN mkdir /home/vagrant/.ssh
-ADD https://raw.githubusercontent.com/mitchellh/vagrant/master/keys/vagrant.pub /home/vagrant/.ssh/authorized_keys
-RUN chmod 0600 /home/vagrant/.ssh/authorized_keys
-RUN chown -R vagrant:vagrant /home/vagrant/.ssh
-RUN chmod 0700 /home/vagrant/.ssh
-
-EXPOSE 22
-CMD ["/usr/sbin/sshd", "-D"]

util/vagrant/readme.md

@@ -1,12 +0,0 @@
-# QMK Vagrant Utilities
-
-## Dockerfile
-Vagrant-friendly `qmkfm/qmk_cli`.
-
-In order for the Docker provider and `vagrant ssh` to function the container has a few extra requirements.
-
-* vagrant user
-* ssh server
-  * configured with expected public key
-* sudo
-  * passwordless for vagrant user