Remove lingering versioneer stuff.

devices/__init__.py

-from ._version import get_versions
-__version__ = get_versions()['version']
-del get_versions

devices/setup.cfg

-
-# 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 =
-#versionfile_build =
-#tag_prefix =
-#parentdir_prefix =
-