
1. Deprecate `.spec.rollbackTo` field in extensions/v1beta1 and apps/v1beta1 Deployments 2. Remove the same field from apps/v1beta2 Deployment, and remove its rollback subresource and endpoint
1. Deprecate `.spec.rollbackTo` field in extensions/v1beta1 and apps/v1beta1 Deployments 2. Remove the same field from apps/v1beta2 Deployment, and remove its rollback subresource and endpoint