debian: drop ws dependency on systemd

This version is satisfied since Bullseye.

Author: bluca

tools/debian/control

@@ -144,7 +144,6 @@ Depends: ${misc:Depends},
          glib-networking,
          adduser,
          openssl,
-         systemd (>= 235),
          libnss-systemd,
 Suggests: sssd-dbus (>= 2.6.2),
          python3,