Remove noisy error log

[ccampo133]

References to other Issues or PRs

Fixes #4605

Have you read the Contributing Guidelines?

Yes

Brief description of what is fixed or changed

Currently, an error is logged whenever a ServerMetadata cannot be extracted from the context, which happens frequently on valid cases like requests to undefined routes. This creates unnecessary noise in logs.

The changes reduce log noise while preserving all existing behavior.

[johanbrandhorst]

Thanks for your contribution!