Hi Prasad,
This is not part of DIR YCA. These are through program so these need to be removed by a developer. Below are the the Web Dypro Component and View details to remove.
Web Dynpro Component - /PLMU/WDC_DIR_BRW
View - V_NAVIGATION
There is a toolbar button BTC_FOLDER which has all these options, a developer can create an implicit enhancement and hide this option.
Hope this helps.
Thanks,
Amar