To start, look to the top of your profile page and click My Network.
Once at your My Network page, look to the left for the Connections option under Manage my network. This will bring you to the entire list of connections you've made while on LinkedIn.
Now, find the person you want to disconnect with by using the search function. You can search for the right contact by using their name, employer, and other identifying information to help make the search easier.
After finding the person in question, look to the right of their listing and click the three dots located next to the Messages button to locate the Remove connection option.
Select Remove Connection to remove that person from your network.
Confirm your decision by clicking Remove. The person in question will not be notified by LinkedIn.
How to Remove a Connection From Your LinkedIn Without Them Knowing