refactor: remove part of unneeded files

systemd/tunasync-snapshot-gc.service

@@ -1,11 +0,0 @@
-[Unit]
-Description=Delete garbage subvolumes generated by tunasync
-Requires = network.target
-After = network.target
-
-[Service]
-Type=oneshot
-ExecStart=/home/tuna/.virtualenvs/tunasync/bin/python -u /home/tuna/tunasync/tunasync_snapshot_gc.py -c /etc/tunasync.ini
-
-[Install]
-WantedBy = multi-user.target

systemd/tunasync-snapshot-gc.timer

@@ -1,8 +0,0 @@
-[Unit]
-Description=TUNAsync GC every 10 minutes
-
-[Timer]
-OnUnitActiveSec=10min
-
-[Install]
-WantedBy=multi-user.target

systemd/tunasync.service

@@ -1,13 +0,0 @@
-[Unit]
-Description = TUNA mirrors sync daemon
-Requires = network.target
-After = network.target
-
-[Service]
-ExecStart = /home/tuna/.virtualenvs/tunasync/bin/python -u /home/tuna/tunasync/tunasync.py -c /etc/tunasync.ini
-KillSignal = SIGTERM
-ExecReload = /bin/kill -SIGUSR1 $MAINPID
-Environment = "HOME=/home/tuna"
-
-[Install]
-WantedBy = multi-user.target