input: Write a function to clean up a list of emails by removing any "+" and ".uk" extensions from the email addresses and return the cleaned list. The original list should remain unchanged.
  
  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(['test+exp@test.com', 'test.uk@test.com', 'test+domain.uk@test.com', 'test@test.com'])==['test@test.com', 'test@test.com', 'test@test.com', 'test@test.com']
output: def clean_emails(emails):
      cleaned_emails = []
      for email in emails:
          email = email.split('+')[0]
          email = email.replace('.uk', '')
          cleaned_emails.append(email)
      return cleaned_emails