[tor-relays] outdated key files in ./keys ?

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I do wonder if I do still need all of these files at my exit relay with verion 0.3.1.5-alpha ?

$> ls keys/ ed25519_master_id_public_key ed25519_signing_secret_key secret_onion_key_ntor ed25519_master_id_secret_key secret_id_key secret_onion_key_ntor.old ed25519_signing_cert secret_onion_key secret_onion_key.old

- -- Toralf PGP C4EACDDE 0076E94E