You can delete your objects stored on OBS, including files and folders. Deleted objects cannot be restored.
s3cmd del s3://my-bucket/object
s3cmd rm s3://my-bucket/object
my-bucket is the bucket where the object resides. object is the name of the object. The object can be a file or folder. If the object that you want to delete is a folder, use parameter --recursive in the command.
s3cmd ls s3://my-bucket