provider/aws: If ecs_service isn't found during Read, delete it

builtin/providers/aws/resource_aws_ecs_service.go

@@ -156,6 +156,8 @@ func resourceAwsEcsServiceRead(d *schema.ResourceData, meta interface{}) error {
 	}
 
 	if len(out.Services) < 1 {
+		log.Printf("[DEBUG] Removing ECS service %q because it's gone", service.ServiceArn)
+		d.SetId("")
 		return nil
 	}