webpack: Drop remaining vestiges of pkg/docker
webpack: Drop remaining vestiges of pkg/docker

Commit d957152c38f forgot to clean up these.

garrett/cockpit,cockpit-project/cockpit,martinpitt/cockpit,martinpitt/cockpit,deryni/cockpit,mvollmer/cockpit,cockpit-project/cockpit,mvollmer/cockpit,garrett/cockpit,garrett/cockpit,mvollmer/cockpit,martinpitt/cockpit,garrett/cockpit,martinpitt/cockpit,cockpit-project/cockpit,garrett/cockpit,deryni/cockpit,martinpitt/cockpit,cockpit-project/cockpit,mvollmer/cockpit,deryni/cockpit,cockpit-project/cockpit,deryni/cockpit,mvollmer/cockpit,deryni/cockpit,deryni/cockpit,deryni/cockpit