Do some cleanup.

setup.cfg

@@ -5,14 +5,9 @@ nocapture=1
 [flake8]
 ignore=E501,E123,E133,FI12,FI14,FI15,FI50,FI51,FI53
 
-# See the docstring in versioneer.py for instructions. Note that you must
-# re-run 'versioneer.py setup' after changing this section, and commit the
-# resulting files.
-
 [versioneer]
 VCS = git
 style = pep440
 versionfile_source = theano/_version.py
 versionfile_build = theano/_version.py
 tag_prefix = rel-
-#parentdir_prefix =