How to remove your SlideShare account
Make sure you’re logged in to your SlideShare account. Then choose ‘Edit Profile’ from the account menu located top right of the page. Now click on ‘manage account’ and choose ‘Delete account’ and follow the instructions.
Direct removal link: https://www.slideshare.net/grierhrenk/edit_manage_accounts
Helpful Trick: Removing online data
Helpful Trick: Remove third-party logins
If you signed up for SlideShare using a third-party login such as Facebook or Twitter, you probably want to revoke all access from SlideShare. Click here to find out how.