remove bumpversion since Jenkins won't play nice

.bumpversion.cfg

-[bumpversion]
-current_version = 2.0
-commit = False
-tag = False
-parse = (?P<major>\d+)\.(?P<minor>\d+)
-serialize = {major}.{minor}
-
-[bumpversion:file:setup.py]
-search = version="{current_version}"
-replace = version="{new_version}"