remove unused normalizeReferenceSchema

Author: lucy66hw

modules/openapi-generator/src/main/java/org/openapitools/codegen/OpenAPINormalizer.java

@@ -779,15 +779,6 @@ protected Schema normalizeSchema(Schema schema, Set<Schema> visitedSchemas, bool
         return schema;
     }
 
-    /**
-     * Normalize reference schema with allOf to support sibling properties
-     *
-     * @param schema         Schema
-     */
-    protected void normalizeReferenceSchema(Schema schema) {
-        normalizeReferenceSchema(schema, false);
-    }
-
     /**
      * Normalize reference schema with allOf to support sibling properties
      *