net: llc: Remove unused function declarations

llc_conn_ac_send_i_rsp_as_ack() and llc_conn_ev_sendack_tmr_exp()
are never implemented since beginning of git history.
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20230803134747.41512-1-yuehaibing@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

include/net/llc_c_ac.h

@@ -175,7 +175,6 @@ int llc_conn_ac_send_ack_if_needed(struct sock *sk, struct sk_buff *skb);
 int llc_conn_ac_adjust_npta_by_rr(struct sock *sk, struct sk_buff *skb);
 int llc_conn_ac_adjust_npta_by_rnr(struct sock *sk, struct sk_buff *skb);
 int llc_conn_ac_rst_sendack_flag(struct sock *sk, struct sk_buff *skb);
-int llc_conn_ac_send_i_rsp_as_ack(struct sock *sk, struct sk_buff *skb);
 int llc_conn_ac_send_i_as_ack(struct sock *sk, struct sk_buff *skb);
 
 void llc_conn_busy_tmr_cb(struct timer_list *t);

include/net/llc_c_ev.h

@@ -158,7 +158,6 @@ int llc_conn_ev_p_tmr_exp(struct sock *sk, struct sk_buff *skb);
 int llc_conn_ev_ack_tmr_exp(struct sock *sk, struct sk_buff *skb);
 int llc_conn_ev_rej_tmr_exp(struct sock *sk, struct sk_buff *skb);
 int llc_conn_ev_busy_tmr_exp(struct sock *sk, struct sk_buff *skb);
-int llc_conn_ev_sendack_tmr_exp(struct sock *sk, struct sk_buff *skb);
 /* NOT_USED functions and their variations */
 int llc_conn_ev_rx_xxx_cmd_pbit_set_1(struct sock *sk, struct sk_buff *skb);
 int llc_conn_ev_rx_xxx_rsp_fbit_set_1(struct sock *sk, struct sk_buff *skb);