remove cleaning from setup.py (iiasa#170)

setup.py

@@ -34,29 +34,6 @@
 }
 
 
-class Cmd(install):
- """Custom clean command to tidy up the project root."""
-
- def initialize_options(self):
- install.initialize_options(self)
-
- def finalize_options(self):
- install.finalize_options(self)
-
- def _clean_dirs(self):
- dirs = [
- 'message_ix.egg-info',
- 'build',
- ]
- for d in dirs:
- print('removing {}'.format(d))
- shutil.rmtree(d)
-
- def run(self):
- install.run(self)
- self._clean_dirs()
-
-
 def all_subdirs(path, strip=None):
  paths = []
  for root, dirnames, filenames in os.walk(path):
@@ -82,7 +59,6 @@ def main():
  ],
  }
  cmdclass = {
- 'install': Cmd,
  }
  pack_data = {
  # for some reason the model/ directory had to be added separately