remove unused pipeline
remove unused pipeline

Signed-off-by: Min Su Han <284323d9cf82eb7cf7a6fdac79e0846042869096@gmail.com>

orange-cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,orange-cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,orange-cloudfoundry/buildpacks-ci