Revert "dnsmasq: add config option for connmark DNS filtering"

This reverts commit dea4bae.

dnsmasq v2.86test3 has some issues with ubus and needs reverting, hence
this needs reverting.

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>

package/network/services/dnsmasq/files/dnsmasq.init

@@ -172,10 +172,6 @@ append_ipset() {
 	xappend "--ipset=$1"
 }
 
-append_connmark_allowlist() {
-	xappend "--connmark-allowlist=$1"
-}
-
 append_interface() {
 	network_get_device ifname "$1" || ifname="$1"
 	xappend "--interface=$ifname"
@@ -921,14 +917,6 @@ dnsmasq_start()
 	config_list_foreach "$cfg" "rev_server" append_rev_server
 	config_list_foreach "$cfg" "address" append_address
 	config_list_foreach "$cfg" "ipset" append_ipset
-
-	local connmark_allowlist_enable
-	config_get connmark_allowlist_enable "$cfg" connmark_allowlist_enable 0
-	[ "$connmark_allowlist_enable" -gt 0 ] && {
-		append_parm "$cfg" "connmark_allowlist_enable" "--connmark-allowlist-enable"
-		config_list_foreach "$cfg" "connmark_allowlist" append_connmark_allowlist
-	}
-
 	[ -n "$BOOT" ] || {
 		config_list_foreach "$cfg" "interface" append_interface
 		config_list_foreach "$cfg" "notinterface" append_notinterface