systemd-python: remove unneeded ifdef for query_unique
systemd-python: remove unneeded ifdef for query_unique

keszybz/python-systemd,Awesense/python-systemd,Awesense/python-systemd,again4you/python-systemd,systemd/python-systemd,Awesense/python-systemd,again4you/python-systemd,systemd/python-systemd,keszybz/python-systemd