Revert "Fix ruleset with iptables + iptables-save"

This reverts commit 0218f4beea.

installers/iptables.rules

@@ -1,24 +1,4 @@
 # RaspAP iptables rules
-*filter
-:INPUT DROP [0:0]
-:FORWARD DROP [0:0]
-:OUTPUT DROP [0:0]
-
-# loopback
--A INPUT -i lo -j ACCEPT
--A OUTPUT -o lo -j ACCEPT
--A INPUT -d 127.0.0.1 -j ACCEPT
--A OUTPUT -s 127.0.0.1 -j ACCEPT
-
-# ACCEPT already ESTABLISHED connections
--A INPUT -p ALL -i eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT
-
-# ACCEPT all OUTPUT
--A OUTPUT -p ALL -o eth0 -j ACCEPT
-
-# SSH
--A INPUT -p tcp -i eth0 --dport 22 -m state --state NEW -j ACCEPT
-
 *nat
 :PREROUTING ACCEPT [0:0]
 :INPUT ACCEPT [0:0]