Simplify module cleanup paths

internal/modules/generic/output/json/encoder.go

@@ -494,38 +494,6 @@ func cloneWarnings(warnings []contracts.Warning) []contracts.Warning {
 	return append([]contracts.Warning(nil), warnings...)
 }
 
-func cloneMetadata(metadata map[string]any) map[string]any {
-	if len(metadata) == 0 {
-		return nil
-	}
-	out := make(map[string]any, len(metadata))
-	for key, value := range metadata {
-		out[key] = cloneJSONMetadataValue(value)
-	}
-	return out
-}
-
-func cloneJSONMetadataValue(value any) any {
-	switch typed := value.(type) {
-	case map[string]any:
-		return cloneMetadata(typed)
-	case []any:
-		out := make([]any, len(typed))
-		for i := range typed {
-			out[i] = cloneJSONMetadataValue(typed[i])
-		}
-		return out
-	case stdjson.RawMessage:
-		return append(stdjson.RawMessage(nil), typed...)
-	case []byte:
-		return append([]byte(nil), typed...)
-	case []string:
-		return append([]string(nil), typed...)
-	default:
-		return value
-	}
-}
-
 func encoderErrorf(format string, args ...any) error {
 	return fmt.Errorf("json output encoder: "+format, args...)
 }