Remove deprecated Ship.DEFAULT_DOCKER_VERSION constant
Remove deprecated Ship.DEFAULT_DOCKER_VERSION constant

Signed-off-by: Maxime Petazzoni <76f7aeeb2d6ed04ef2b101cc81e4baac9b89c3cf@bulix.org>

signalfuse/maestro-ng,signalfx/maestro-ng,signalfuse/maestro-ng,signalfx/maestro-ng,zsuzhengdu/maestro-ng,zsuzhengdu/maestro-ng