Remove the following unreferenced symbols:
- (*S3Agent).CreateBucketNoInfoLogging
- (*S3Agent).DeleteBucket (wrapper; callers use the SDK client directly)
- GetBucketsStats
- ObjectBuckets type and its Len/Less/Swap sort.Interface methods
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Joshua Hoblitt <josh@hoblitt.com>