netfilter: x_tables: Remove unused functions xt_{in|out}name()

Since commit 2173c519d5e9 ("audit: normalize NETFILTER_PKT")
these are unused, so can be removed.

Signed-off-by: Yue Haibing <[e-mail]>
Signed-off-by: Pablo Neira Ayuso <[e-mail]>

include/linux/netfilter/x_tables.h

···
 	return par->state->in;
 }
 
-static inline const char *xt_inname(const struct xt_action_param *par)
-{
-	return par->state->in->name;
-}
-
 static inline struct net_device *xt_out(const struct xt_action_param *par)
 {
 	return par->state->out;
-}
-
-static inline const char *xt_outname(const struct xt_action_param *par)
-{
-	return par->state->out->name;
 }
 
 static inline unsigned int xt_hooknum(const struct xt_action_param *par)