single drive: Remove bucket metadata on DeleteBucket (#15378)
single drive: Remove bucket metadata on DeleteBucket (#15378)

from disk and in-memory map
donatello/minio,donatello/minio,minio/minio,vadmeste/minio,minio/minio,krisis/minio,balamurugana/minio,balamurugana/minio,krisis/minio,vadmeste/minio