old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  from setuptools import setup
  
  setup(
      setup_requires=[
          'pbr',
          'maven-artifact',
          'six', 'future'
      ],
      dependency_links=[
          'git+https://github.com/hamnis/maven-artifact.git@0.1.4#egg=maven-artifact-0.1.4'
      ],
      pbr=True,
  )
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  from setuptools import setup
  
  setup(
      setup_requires=['pbr'],
      pbr=True,
  )
  
subject: simplify setup.py