code: func (api *Client) DeleteFileCommentContext(ctx context.Context, fileID, commentID string) (err error) {
  	if fileID == "" || commentID == "" {
  		return ErrParametersMissing
  	}
  
  	values := url.Values{
  		"token": {api.token},
  		"file":  {fileID},
  		"id":    {commentID},
  	}
  	_, err = api.fileRequest(ctx, "files.comments.delete", values)
  	return err
  }
docs: // DeleteFileCommentContext deletes a file's comment with a custom context