demo private key should be removed

[mykaul]

Trivy (security scanner) reports the following:

/opt/scylladb/python3/lib64/python3.13/site-packages/kmip/demos/certs/server.key (secrets)

Total: 1 (UNKNOWN: 0, LOW: 0, MEDIUM: 0, HIGH: 1, CRITICAL: 0)

HIGH: AsymmetricPrivateKey (private-key)
══════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════
Asymmetric Private Key
──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
 /opt/scylladb/python3/lib64/python3.13/site-packages/kmip/demos/certs/server.key:1 (added by '/bin/sh')
──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
   1 [ ----BEGIN RSA PRIVATE KEY-----**********************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************-----END RSA PRIVATE
   2   
──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────

Even if it's not a real security issue, it's a perceived one. The demo should just contain the command line or the instructions to create the key.