Updated to use new mass "remove friends" option on orkut. Making it 20 times faster.

Manually u need to perform following 3 steps for deleting a pending friend request:
Selecting 'EDIT' link;
   
Clicking on 'DELETE' button;
   
Again Hitting 'YES' button when confirmation dialog box pops out!

So I decided to create a GreaseMonkey Script and after few hours of works its ready for you! The good thing about this one is its preconfigured to delete only pending friend request although it is technically capable of deleting all friends!

Related Script:
Auto Confirm Friend Request: Whenever you accept any pending friend request or add someone to your friendlist, this script automatically clicks on "yes" button on confirmation page! Use it if new on orkut and want to add many friends! :-)

Thanks for your visit! If you like my work please visit Devils Workshop for more... :-)