Deregisters the specified task definition by family and revision. Upon
deregistration, the task definition is marked as INACTIVE. Existing
tasks and services that reference an INACTIVE task definition continue
to run without disruption. Existing services that reference an
INACTIVE task definition can still scale up or down by modifying the
service's desired count.
ecs_deregister_task_definition(taskDefinition)[required] The family and revision (family:revision) or full Amazon Resource
Name (ARN) of the task definition to deregister. You must specify a
revision.
svc$deregister_task_definition( taskDefinition = "string" )
You cannot use an INACTIVE task definition to run new tasks or create
new services, and you cannot update an existing service to reference an
INACTIVE task definition. However, there may be up to a 10-minute
window following deregistration where these restrictions have not yet
taken effect.
At this time, INACTIVE task definitions remain discoverable in your
account indefinitely. However, this behavior is subject to change in the
future, so you should not rely on INACTIVE task definitions persisting
beyond the lifecycle of any associated tasks and services.