tailscaled: remove comment from systemd unit.
No need to ship TODOs to end user systems.
@@ -16,7 +16,6 @@ RuntimeDirectory=tailscale
RuntimeDirectoryMode=0755
StateDirectory=tailscale
StateDirectoryMode=0750
-# TODO(danderson): make a less privileged user and grant pinhole CAP_*.
User=root
Group=root
