v2022: iptables package has changed it's name in openwrt

In OpenWrt or Gluon v2022 the package name for iptables has changed.
We still need the iptables tool; but it seems some other package already
depends on the correct thing... We'll just remove it here.

site.mk

@@ -17,7 +17,6 @@ GLUON_SITE_PACKAGES := \
 	gluon-status-page \
 	gluon-web-private-wifi \
 	iwinfo \
-	iptables \
 	gluon-web-network \
 	wireguard-tools kmod-wireguard \
 	gluon-ffbsnext-nodeconfig \