netfilter: remove no-op kconfig symbols

These have long been obsolete. For reference, here's the Linux version where
each symbol has been dropped:

CONFIG_IP6_NF_QUEUE - 3.5
CONFIG_IP6_NF_TARGET_LOG - 3.4
CONFIG_IP_NF_MATCH_DSCP - 2.6.19
CONFIG_NF_CONNTRACK_IPV4 - 4.19
CONFIG_NF_CONNTRACK_IPV6 - 4.19
CONFIG_NF_CONNTRACK_RTCACHE - out-of-tree, superseded by flow offloading

Signed-off-by: Rui Salvaterra <[email protected]>

include/netfilter.mk

@@ -64,9 +64,7 @@ $(eval $(if $(NF_KMOD),,$(call nf_add,IPT_CORE,CONFIG_NETFILTER_XT_MARK, $(P_XT)
 
 # kernel only
 $(eval $(if $(NF_KMOD),$(call nf_add,NF_CONNTRACK,CONFIG_NF_CONNTRACK, $(P_XT)nf_conntrack),))
-$(eval $(if $(NF_KMOD),$(call nf_add,NF_CONNTRACK,CONFIG_NF_CONNTRACK_RTCACHE, $(P_XT)nf_conntrack_rtcache),))
 $(eval $(if $(NF_KMOD),$(call nf_add,NF_CONNTRACK,CONFIG_NF_DEFRAG_IPV4, $(P_V4)nf_defrag_ipv4),))
-$(eval $(if $(NF_KMOD),$(call nf_add,NF_CONNTRACK,CONFIG_NF_CONNTRACK_IPV4, $(P_V4)nf_conntrack_ipv4),))
 
 $(eval $(call nf_add,IPT_CONNTRACK,CONFIG_NETFILTER_XT_MATCH_STATE, $(P_XT)xt_state))
 $(eval $(call nf_add,IPT_CONNTRACK,CONFIG_NETFILTER_XT_TARGET_CT, $(P_XT)xt_CT))
@@ -120,7 +118,6 @@ $(eval $(call nf_add,IPT_IPOPT,CONFIG_NETFILTER_XT_MATCH_STATISTIC, $(P_XT)xt_st
 $(eval $(call nf_add,IPT_IPOPT,CONFIG_NETFILTER_XT_MATCH_TCPMSS, $(P_XT)xt_tcpmss))
 
 $(eval $(call nf_add,IPT_IPOPT,CONFIG_NETFILTER_XT_TARGET_CLASSIFY, $(P_XT)xt_CLASSIFY))
-$(eval $(call nf_add,IPT_IPOPT,CONFIG_IP_NF_MATCH_DSCP, $(P_V4)ipt_dscp))
 $(eval $(call nf_add,IPT_IPOPT,CONFIG_IP_NF_TARGET_ECN, $(P_V4)ipt_ECN))
 
 $(eval $(call nf_add,IPT_IPOPT,CONFIG_NETFILTER_XT_MATCH_ECN, $(P_XT)xt_ecn))
@@ -156,17 +153,14 @@ $(eval $(if $(NF_KMOD),$(call nf_add,NF_REJECT6,CONFIG_NF_REJECT_IPV6, $(P_V6)nf
 $(eval $(if $(NF_KMOD),$(call nf_add,NF_IPT6,CONFIG_IP6_NF_IPTABLES, $(P_V6)ip6_tables),))
 
 $(eval $(if $(NF_KMOD),$(call nf_add,NF_CONNTRACK,CONFIG_NF_DEFRAG_IPV6, $(P_V6)nf_defrag_ipv6),))
-$(eval $(if $(NF_KMOD),$(call nf_add,NF_CONNTRACK6,CONFIG_NF_CONNTRACK_IPV6, $(P_V6)nf_conntrack_ipv6),))
 
 $(eval $(if $(NF_KMOD),$(call nf_add,IPT_IPV6,CONFIG_IP6_NF_FILTER, $(P_V6)ip6table_filter),))
 $(eval $(if $(NF_KMOD),$(call nf_add,IPT_IPV6,CONFIG_IP6_NF_MANGLE, $(P_V6)ip6table_mangle),))
-$(eval $(if $(NF_KMOD),$(call nf_add,IPT_IPV6,CONFIG_IP6_NF_QUEUE, $(P_V6)ip6_queue),))
 $(eval $(if $(NF_KMOD),$(call nf_add,IPT_IPV6,CONFIG_NF_LOG_IPV6, $(P_V6)nf_log_ipv6),))
 
 $(eval $(if $(NF_KMOD),,$(call nf_add,IPT_IPV6,CONFIG_IP6_NF_IPTABLES, ip6t_icmp6)))
 
 
-$(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_TARGET_LOG, $(P_V6)ip6t_LOG))
 $(eval $(call nf_add,IPT_IPV6,CONFIG_IP6_NF_TARGET_REJECT, $(P_V6)ip6t_REJECT))
 
 # ipv6 extra

target/linux/generic/config-5.10

@@ -4010,8 +4010,6 @@ CONFIG_NFS_V3=y
 # CONFIG_NF_CONNTRACK_EVENTS is not set
 # CONFIG_NF_CONNTRACK_FTP is not set
 # CONFIG_NF_CONNTRACK_H323 is not set
-# CONFIG_NF_CONNTRACK_IPV4 is not set
-# CONFIG_NF_CONNTRACK_IPV6 is not set
 # CONFIG_NF_CONNTRACK_IRC is not set
 # CONFIG_NF_CONNTRACK_LABELS is not set
 # CONFIG_NF_CONNTRACK_MARK is not set

target/linux/generic/config-5.4

@@ -3687,8 +3687,6 @@ CONFIG_NFS_V3=y
 # CONFIG_NF_CONNTRACK_EVENTS is not set
 # CONFIG_NF_CONNTRACK_FTP is not set
 # CONFIG_NF_CONNTRACK_H323 is not set
-# CONFIG_NF_CONNTRACK_IPV4 is not set
-# CONFIG_NF_CONNTRACK_IPV6 is not set
 # CONFIG_NF_CONNTRACK_IRC is not set
 # CONFIG_NF_CONNTRACK_LABELS is not set
 # CONFIG_NF_CONNTRACK_MARK is not set