remove unused code

src/main/scala/com/aliyun/odps/spark/examples/makedata_ad/v20240718/makedata_ad_31_originData_20250623.scala

@@ -73,8 +73,6 @@ object makedata_ad_31_originData_20250623 {
 
             val featureMap = new JSONObject()
 
-            val mateFeature: JSONObject = if (record.isNull("metafeaturemap")) new JSONObject() else
-              JSON.parseObject(record.getString("metafeaturemap"))
 
             val b1: JSONObject = if (record.isNull("b1_feature")) new JSONObject() else
               JSON.parseObject(record.getString("b1_feature"))