hgext3rd/__init__.py

mergestate: remove unnecessary clearing of `localctx` and `otherctx`

As noted in the previous commit, there are no callers that (re-)use
the instance after calling `reset()`. There are also no callers that
call `_read()` after doing anything with the instance (it's only
called right after an instance is created).

If reviewers feel that this is too risky, I can extract and reuse the
poisoning code that indygreg once added for poisining repo instances.

Differential Revision: https://phab.mercurial-scm.org/D9036

# name space package to host third party extensions
from __future__ import absolute_import
import pkgutil

__path__ = pkgutil.extend_path(__path__, __name__)