input: Write a function to clean up a list of emails and put them into a new list. The function should remove any addresses containing '+', and any '.uk' extensions from the emails in the original list. Ensure the function returns the cleaned list.
  
  assert clean_emails(['bob@example.com', 'alice+bob@cafe.com', 'bob@gmail.com.uk', 'bob+alice@example']) == ['bob@example.com', 'alice@cafe.com', 'bob@gmail.com', 'bob@example']
  assert clean_emails([]) == []
output: def clean_emails(emails):
      cleaned_list = []
      for email in emails:
          if '+' not in email and '.uk' not in email:
              cleaned_list.append(email)
      return cleaned_list