We think the Spotify suggestion functionality is pretty awesome. But if you don't want to see a song suggestion, you can easily remove it.
Select the 'Songs' section from the main menu, on the left side.
Under the song suggestion section, you will see a list of songs from your Spotify account.
Click on the specific song suggestion you want to remove, then select:
Click on the 'remove suggestion' button, on the right-hand corner.
This will remove this song suggestion from the list.