The program automatically carried the "shell K-1" information forward, primarily to make sure you did not forget it in case it was still part of your income in 2016.
Use the "Delete a Form" tool to
remove the K-1.
See: How do I delete forms in TurboTax Online?
After deleting the K-1, log out of the
program. When you log back in, use the Delete a Form tool to confirm
the K-1 has been removed from the list of forms in your
return.