To remove a follower on Spotify, you can follow these steps:
Open the Spotify app on your mobile device or desktop.
Go to your profile by clicking on your username or avatar at the top right corner of the screen.
Click on the "Followers" tab to view your list of followers.
Find the follower you want to remove and click on their profile to open it.
Click on the three dots icon at the top right corner of their profile.
Select "Remove Follower" from the options that appear.
Confirm that you want to remove the follower by clicking on "Yes" or "Remove."
The follower will be removed from your followers list and will no longer be able to see your public playlists or activity on Spotify. Note that removing a follower does not block them from following you again in the future.