diff --git a/pkg/workflow/compiler_orchestrator_test.go b/pkg/workflow/compiler_orchestrator_test.go
index 8498050999f..e344c8dfa9d 100644
--- a/pkg/workflow/compiler_orchestrator_test.go
+++ b/pkg/workflow/compiler_orchestrator_test.go
@@ -481,9 +481,3 @@ func TestDetectTextOutputUsageInOrchestrator(t *testing.T) {
 		})
 	}
 }
-
-// Helper functions
-
-func hasInternalPrefix(key string) bool {
-	return len(key) > 2 && key[0] == '_' && key[1] == '_'
-}