You can delete a contact from a specific list using 2 options.
Option 1: From the All contacts page.
Go to the Contacts tab -> All Contacts, open the drop-down menu of the contact you want to delete from the list, and choose Delete.
In the pop-up window, you will be asked to select the list you want to delete the contact from.
After selecting the list, click on Confirm and the contact will be deleted from the selected list.
Option 2: From the specific list page.
Go to Contacts -> Lists, and click on the List that you need to delete the contact from.
Select the contact you want to delete and choose Delete from the drop-down menu.
You will be asked to confirm if you want to delete this contact.
Please note that if the contact exists in multiple lists, he will be deleted only from this list.