net: snmp: remove SNMP_MIB_SENTINEL

No more user of SNMP_MIB_SENTINEL, we can remove it.

Also remove snmp_get_cpu_field[64]_batch() helpers.

Signed-off-by: Eric Dumazet <[e-mail]>
Reviewed-by: Sabrina Dubroca <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

include/net/ip.h

···
 }
 #endif
 
-#define snmp_get_cpu_field64_batch(buff64, stats_list, mib_statistic, offset) \
-{ \
-	int i, c; \
-	for_each_possible_cpu(c) { \
-		for (i = 0; stats_list[i].name; i++) \
-			buff64[i] += snmp_get_cpu_field64( \
-					mib_statistic, \
-					c, stats_list[i].entry, \
-					offset); \
-	} \
-}
-
 #define snmp_get_cpu_field64_batch_cnt(buff64, stats_list, cnt,	\
 				       mib_statistic, offset)	\
 { \
···
 					mib_statistic, \
 					c, stats_list[i].entry, \
 					offset); \
-	} \
-}
-
-#define snmp_get_cpu_field_batch(buff, stats_list, mib_statistic) \
-{ \
-	int i, c; \
-	for_each_possible_cpu(c) { \
-		for (i = 0; stats_list[i].name; i++) \
-			buff[i] += snmp_get_cpu_field( \
-						mib_statistic, \
-						c, stats_list[i].entry); \
 	} \
 }
 

include/net/snmp.h

···
 	.entry = _entry,			\
 }
 
-#define SNMP_MIB_SENTINEL {	\
-	.name = NULL,		\
-	.entry = 0,		\
-}
-
 /*
  * We use unsigned longs for most mibs but u64 for ipstats.
  */