netfilter: conntrack: remove two unused functions from nf_conntrack_timestamp.h.

Two inline functions defined in nf_conntrack_timestamp.h,
`nf_ct_tstamp_enabled` and `nf_ct_set_tstamp`, are not called anywhere.
Remove them.
Signed-off-by: NJeremy Sowden <jeremy@azazel.net>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

include/net/netfilter/nf_conntrack_timestamp.h

@@ -38,22 +38,6 @@ struct nf_conn_tstamp *nf_ct_tstamp_ext_add(struct nf_conn *ct, gfp_t gfp)
 #endif
 };
 
-static inline bool nf_ct_tstamp_enabled(struct net *net)
-{
-#if IS_ENABLED(CONFIG_NF_CONNTRACK)
-	return net->ct.sysctl_tstamp != 0;
-#else
-	return false;
-#endif
-}
-
-static inline void nf_ct_set_tstamp(struct net *net, bool enable)
-{
-#if IS_ENABLED(CONFIG_NF_CONNTRACK)
-	net->ct.sysctl_tstamp = enable;
-#endif
-}
-
 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
 void nf_conntrack_tstamp_pernet_init(struct net *net);