Self Hosted Runner token can expire before removal

[hato1883]

The token given by the registration endpoint is only valid for about 1 hour.
After this time limit the removal will fail (not remove runner from repository).

To fix this you need to change the removal step to something along the lines of:

remove() {
    removal_url="https://api.github.com/repos/${GITHUB_OWNER}/${GITHUB_REPOSITORY}/actions/runners/remove-token"
    echo "Requesting removal TOKEN at '${removal_url}'" # optional
    payload=$(curl -sX POST -H "Authorization: token ${GITHUB_PERSONAL_TOKEN}" ${removal_url})
    RUNNER_REMOVAL_TOKEN=$(echo $payload | jq .token --raw-output)
    ./config.sh remove --token "${RUNNER_REMOVAL_TOKEN}"
}

This will make sure that you will always have a valid token when removing the runner.