Drop unreleased features (record & replay) (#1406)

1. The records are stored in redis which is not migratable to another cluster for the testing purposes.
2. Some of the requests fields are not recorded.
3. People should consider using https://github.com/buger/goreplay which is an existing mature and well-tested solution for testing purposes.

pkg/fission-cli/cmd/spec/spec.go

@@ -209,10 +209,6 @@ func SpecSave(resource interface{}, specFile string) error {
 		typedres.TypeMeta.APIVersion = fv1.CRD_VERSION
 		typedres.TypeMeta.Kind = "TimeTrigger"
 		data, err = yaml.Marshal(typedres)
-	case fv1.Recorder:
-		typedres.TypeMeta.APIVersion = fv1.CRD_VERSION
-		typedres.TypeMeta.Kind = "Recorder"
-		data, err = yaml.Marshal(typedres)
 	default:
 		return fmt.Errorf("can't save resource %#v", resource)
 	}