S3 Backup: Remove list of compression algorithms
This list is not up to date with what
ChunkedBackupDriver supports.  (i.e. zstd)
Ceilometer when backing up the volume to the
S3 backend storage. (default: True)
:backup_compression_algorithm: Compression algorithm to use for volume
- backups. Supported options are:
- None (to disable), zlib, bz2
- and zstd. (default: zlib)
+ backups.
"""
import base64
