ci: remove Docker based jobs
ci: remove Docker based jobs

They are covered by package jobs.

groonga/groonga,kenhys/groonga,komainu8/groonga,naoa/groonga,kenhys/groonga,naoa/groonga,komainu8/groonga,groonga/groonga,naoa/groonga,kenhys/groonga,groonga/groonga,groonga/groonga,naoa/groonga,kenhys/groonga,naoa/groonga,naoa/groonga,kenhys/groonga,komainu8/groonga,groonga/groonga,groonga/groonga,komainu8/groonga,naoa/groonga,kenhys/groonga,kenhys/groonga,komainu8/groonga,groonga/groonga,komainu8/groonga,groonga/groonga,komainu8/groonga,kenhys/groonga,naoa/groonga,komainu8/groonga