Remove obsoleted code for subscribable interface (#602)

* Remove duplicate code

Signed-off-by: Galo Navarro <[email protected]>

* fixup! Remove duplicate code

.gitignore

@@ -3,3 +3,4 @@ bazel-*
 .idea/
 .vscode/
 .DS_Store
+*.swp

pkg/apis/eventing/v1alpha1/subscribable_channelable_validation.go

@@ -50,31 +50,6 @@ func isValidChannel(f corev1.ObjectReference) *apis.FieldError {
 	return errs
 }
 
-func isSubscribableEmpty(f corev1.ObjectReference) bool {
-	return equality.Semantic.DeepEqual(f, corev1.ObjectReference{})
-}
-
-// Valid from only contains the following fields:
-// - Kind       == 'Channel'
-// - APIVersion == 'eventing.knative.dev/v1alpha1'
-// - Name       == not empty
-func isValidSubscribable(f corev1.ObjectReference) *apis.FieldError {
-	errs := isValidObjectReference(f)
-
-	if f.Kind != "Channel" {
-		fe := apis.ErrInvalidValue(f.Kind, "kind")
-		fe.Paths = []string{"kind"}
-		fe.Details = "only 'Channel' kind is allowed"
-		errs = errs.Also(fe)
-	}
-	if f.APIVersion != "eventing.knative.dev/v1alpha1" {
-		fe := apis.ErrInvalidValue(f.APIVersion, "apiVersion")
-		fe.Details = "only eventing.knative.dev/v1alpha1 is allowed for apiVersion"
-		errs = errs.Also(fe)
-	}
-	return errs
-}
-
 func isValidObjectReference(f corev1.ObjectReference) *apis.FieldError {
 	return checkRequiredObjectReferenceFields(f).
 		Also(checkDisallowedObjectReferenceFields(f))

pkg/apis/eventing/v1alpha1/subscribable_channelable_validation_test.go

@@ -98,16 +98,6 @@ func TestIsValidChannel(t *testing.T) {
 		})
 	}
 }
-func TestIsValidSubscribable(t *testing.T) {
-	for _, test := range validationTests {
-		t.Run(test.name, func(t *testing.T) {
-			got := isValidSubscribable(test.ref)
-			if diff := cmp.Diff(test.want.Error(), got.Error()); diff != "" {
-				t.Errorf("%s: validation (-want, +got) = %v", test.name, diff)
-			}
-		})
-	}
-}
 
 func TestIsValidObjectReference(t *testing.T) {
 	tests := []struct {