Removed bionic build-deb image
Since bionic's EOL is soon it doesn't make sense to keep building the build-deb image for it. Clickable & click-reviewers-tools will have separate PRs to update them to the focal version.
Since bionic's EOL is soon it doesn't make sense to keep building the build-deb image for it. Clickable & click-reviewers-tools will have separate PRs to update them to the focal version.