old_contents: import csv
  from collections import namedtuple
  
  TACKLE_READER_FORMAT = 'csv'
  
  def reader(f):
  	csv_reader = csv.reader(f)
  	headers = next(csv_reader)
  	return [dict(zip(headers, r)) for r in csv_reader]
  
new_contents: import csv
  
  TACKLE_READER_FORMAT = 'csv'
  
  def reader(f):
  	csv_reader = csv.reader(f)
  	headers = next(csv_reader)
  	return [dict(zip(headers, r)) for r in csv_reader]
  
subject: clean up unused import