not able to delete network interfaces linked with dead

Generally you should not post the IDs of your ENI on re:Post because this is a public forum.

That said, you do want to ensure you know what you are doing and not deleting ENIs that are needed by your application.

If you do need to delete an ENI, that's say from a failed instance, you will be able to use the

aws ec2 detach-network-interface --attachment-id <VALUE> --force

CLI command. [1]