code: def delete(context, item):
      
      history_log = context.obj['history_log']
      no_color = context.obj['no_color']
      try:
          with open(history_log, 'r+') as f:
              lines = f.readlines()
              history = lines.pop(len(lines) - item)
              f.seek(0)
              f.write(''.join(lines))
              f.flush()
              f.truncate()
      except IndexError:
          echo_style(
              'History result at index %s does not exist.' % item,
              no_color,
              fg='red'
          )
          sys.exit(1)
      except Exception as error:
          echo_style(
              'Unable to delete result item {0}. {1}'.format(item, error),
              no_color,
              fg='red'
          )
          sys.exit(1)
  
      log_file = get_log_file_from_item(history)
      try:
          os.remove(log_file)
      except Exception:
          echo_style(
              'Unable to delete results file for item {0}.'.format(item),
              no_color,
              fg='red'
          )
  
      try:
          os.remove(log_file.rsplit('.', 1)[0] + '.results')
      except Exception:
          echo_style(
              'Unable to delete log file for item {0}.'.format(item),
              no_color,
              fg='red'
          )
docs: Delete the specified history item from the history log.