Refactor the engine.Interface such that the Set() API does not return an extraneous error

Signed-off-by: Christopher Desiniotis <cdesiniotis@nvidia.com>

pkg/config/engine/containerd/containerd.go

@@ -31,6 +31,8 @@ type Config struct {
 	ContainerAnnotations  []string
 }
 
+var _ engine.Interface = (*Config)(nil)
+
 // New creates a containerd config with the specified options
 func New(opts ...Option) (engine.Interface, error) {
 	b := &builder{}