chore: remove unused code (#6674)

internal/admission/validation/consumers/credentials/validation.go

@@ -71,24 +71,6 @@ func ValidateCredentials(secret *corev1.Secret) error {
 	return nil
 }
 
-// IsKeyUniqueConstrained indicates whether or not a given key and its type there
-// are unique constraints in place.
-func IsKeyUniqueConstrained(keyType, key string) (constrained bool) {
-	constrainedKeys, credTypeHasConstraints := uniqueKeyConstraints[keyType]
-	if !credTypeHasConstraints {
-		return
-	}
-
-	for _, constrainedKey := range constrainedKeys {
-		if key == constrainedKey {
-			constrained = true
-			return
-		}
-	}
-
-	return
-}
-
 // -----------------------------------------------------------------------------
 //  Validation - Credentials
 // -----------------------------------------------------------------------------

internal/admission/validation/consumers/credentials/validation_test.go

@@ -12,59 +12,6 @@ import (
 	"github.com/kong/kubernetes-ingress-controller/v3/internal/labels"
 )
 
-func TestUniqueConstraintsValidation(t *testing.T) {
-	t.Log("Setting up an index of existing credentials which have unique constraints")
-	index := make(Index)
-	require.NoError(t, index.add(Credential{
-		Key:   "username",
-		Value: "batman",
-		Type:  "basic-auth",
-	}))
-	require.NoError(t, index.add(Credential{
-		Key:   "username",
-		Value: "robin",
-		Type:  "basic-auth",
-	}))
-
-	t.Log("Verifying that a new basic-auth credential with a unique username doesn't violate constraints")
-	nonviolatingCredential := Credential{
-		Key:   "username",
-		Value: "nightwing",
-		Type:  "basic-auth",
-	}
-	assert.NoError(t, index.add(nonviolatingCredential))
-
-	t.Log("Verifying that a new basic-auth credential with a username that's already in use violates constraints")
-	violatingCredential := Credential{
-		Key:   "username",
-		Value: "batman",
-		Type:  "basic-auth",
-	}
-	assert.True(t, IsKeyUniqueConstrained(violatingCredential.Type, violatingCredential.Key))
-	err := index.add(violatingCredential)
-	assert.Error(t, err)
-
-	t.Log("Setting up a list of existing credentials which have no unique constraints")
-	index = make(Index)
-	assert.NoError(t, index.add(Credential{
-		Key:   "key",
-		Value: "test",
-		Type:  "acl",
-	}))
-
-	t.Log("Verifying that non-unique constrained credentials don't trigger a violation")
-	duplicate := Credential{
-		Key:   "key",
-		Value: "test",
-		Type:  "acl",
-	}
-	assert.False(t, IsKeyUniqueConstrained(duplicate.Type, duplicate.Key))
-	assert.NoError(t, index.add(duplicate))
-
-	t.Log("Verifying that unconstrained keys for types with constraints don't flag as violated")
-	assert.False(t, IsKeyUniqueConstrained("basic-auth", "unconstrained-key"))
-}
-
 func TestValidateCredentials(t *testing.T) {
 	tests := []struct {
 		name    string