old_contents: const { config, preset } = require('./src');
  
  module.exports = config(
    preset.babel({ es: false, esnext: false }),
    preset.base(),
    preset.jest({ wallaby: true })
  );
  
new_contents: const { config, preset } = require('./src');
  
  module.exports = config(
    preset.babel({ es: false, esnext: false }),
    preset.base(),
    preset.jest()
  );
  
subject: Remove configration from a preset that I was testing.