No need to save the row with __$operation value 3

Hi 

   I have enabled the CDC for one table in sql server 2014 database and if i update the one row in the table that will 

   Create new two rows in the CDC table(Before update-__$operation3 and after update __$operation4).

   Here my question is i dont want to save the Before before(__$operation3) row in the CDC table so how should i disable saving

   that before update row in the CDC table?

--Regards

Sunil