fix(接口测试): 解决接口测试swagger3导入丢失非引用属性的值的问题

https://www.tapd.cn/55049933/bugtrace/bugs/view?bug_id=1155049933001017816
--user=郭雨琦

backend/src/main/java/io/metersphere/api/dto/definition/parse/Swagger3Parser.java

@@ -478,9 +478,6 @@ public class Swagger3Parser extends SwaggerAbstractParser {
 
     private JsonSchemaItem parseSchema(Schema schema, Set<String> refSet) {
         if (schema == null) return null;
-        if (StringUtils.isBlank(schema.get$ref()) && schema.getProperties() == null && refSet.isEmpty() && schema.getExample() == null) {
-            return null;
-        }
         JsonSchemaItem item = new JsonSchemaItem();
         if (schema.getRequired() != null) {
             item.setRequired(schema.getRequired());