During the refactoring for 18.09 the activate/update flows no longer restart the engine explicitly but let the user do that when they're ready, so the health check logic is no longer required. Signed-off-by: Daniel Hiltgen <daniel.hiltgen@docker.com> (cherry picked from commit f2b2061cc38995a4d16659787d80563d8ec669d0) Signed-off-by: Sebastiaan van Stijn <github@gone.nl>