Remove deprecated option expire_logs_days from default config

[fraenki]

Summary

The option expire_logs_days is deprecated and should no longer be used. This PR removes it from the default configuration.

Additional Context

This change should only have a minor effect on existing installations. Old versions of MySQL (5.7) will fallback to their internal default value of expire_logs_days. Newer versions (MySQL 8.0) will probably already use the new option binlog_expire_logs_seconds.

This removes the following warning from MySQL's log:

[Server] The syntax 'expire-logs-days' is deprecated and will be removed in a future release. Please use binlog_expire_logs_seconds instead.

Related Issues (if any)

none

Checklist

• [ ] 🟢 Spec tests.
• [ ] 🟢 Acceptance tests.
• [ ] Manually verified. (For example puppet apply)

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