sctp: Remove unused function declarations

These declarations are never implemented since beginning of git history.

Signed-off-by: Yue Haibing <[e-mail]>
Reviewed-by: Simon Horman <[e-mail]>
Acked-by: Xin Long <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

include/net/sctp/sm.h

···
 sctp_state_fn_t sctp_sf_autoclose_timer_expire;
 
 /* Prototypes for utility support functions.  */
-__u8 sctp_get_chunk_type(struct sctp_chunk *chunk);
 const struct sctp_sm_table_entry *sctp_sm_lookup_event(
 					struct net *net,
 					enum sctp_event_type event_type,
···
 struct sctp_association *sctp_make_temp_asoc(const struct sctp_endpoint *,
 					     struct sctp_chunk *,
 					     gfp_t gfp);
-__u32 sctp_generate_verification_tag(void);
-void sctp_populate_tie_tags(__u8 *cookie, __u32 curTag, __u32 hisTag);
 
 /* Prototypes for chunk-building functions.  */
 struct sctp_chunk *sctp_make_init(const struct sctp_association *asoc,

include/net/sctp/structs.h

···
 void sctp_outq_tail(struct sctp_outq *, struct sctp_chunk *chunk, gfp_t);
 int sctp_outq_sack(struct sctp_outq *, struct sctp_chunk *);
 int sctp_outq_is_empty(const struct sctp_outq *);
-void sctp_outq_restart(struct sctp_outq *);
-
 void sctp_retransmit(struct sctp_outq *q, struct sctp_transport *transport,
 		     enum sctp_retransmit_reason reason);
 void sctp_retransmit_mark(struct sctp_outq *, struct sctp_transport *, __u8);