rust-filepatterns: remove bridge code for filepatterns-related functions
These functions will be used internally by `hg-core` without needed to be
exposed to Python.
Differential Revision: https://phab.mercurial-scm.org/D7868
# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil
__path__ = pkgutil.extend_path(__path__, __name__)