Why use this automation?
LinkedIn limits the number of connection requests you can send. Once you hit the 1,500 invitation cap, you can’t send more until you clear pending requests. Unused invitations take up space in your network and reduce opportunities to connect with the right people.
Click on the home page of dashboard, you can see "pending" button on the top right corner
then click on left of the name to select all the pending request. You can then click on "withdraw selected" or just enter the number of request you want to withdraw and click on "withdraw" button