code: def s3_delete_file(bucket, filename, client=None, raiseonfail=False):
      
  
      if not client:
          client = boto3.client('s3')
  
      try:
          resp = client.delete_object(Bucket=bucket, Key=filename)
          if not resp:
              LOGERROR('could not delete file %s from bucket %s' % (filename,
                                                                    bucket))
          else:
              return resp['DeleteMarker']
      except Exception as e:
          LOGEXCEPTION('could not delete file %s from bucket %s' % (filename,
                                                                    bucket))
          if raiseonfail:
              raise
  
          return None
docs: This deletes a file from S3.
  
      Parameters
      ----------
  
      bucket : str
          The AWS S3 bucket to delete the file from.
  
      filename : str
          The full file name of the file to delete, including any prefixes.
  
      client : boto3.Client or None
          If None, this function will instantiate a new `boto3.Client` object to
          use in its operations. Alternatively, pass in an existing `boto3.Client`
          instance to re-use it here.
  
      raiseonfail : bool
          If True, will re-raise whatever Exception caused the operation to fail
          and break out immediately.
  
      Returns
      -------
  
      str or None
          If the file was successfully deleted, will return the delete-marker
          (https://docs.aws.amazon.com/AmazonS3/latest/dev/DeleteMarker.html). If
          it wasn't, returns None