netbase: remove unnecessary log message

Summary:
This is a follow-up to D19737 that removes a spammy non-debug-level log message we don't need.
see https://github.com/bitcoin/bitcoin/pull/27375#issuecomment-1994498888

Backport of core#29649

Test Plan: ninja all check-all

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D19808