eal/linux: remove unused variable for socket memory

clang-13 rightfully complains that the total_mem variable in
eal_parse_socket_arg is set but not used, since the final
accumulated total_mem result isn't used anywhere.
So just remove the total_mem variable.

Fixes: 0a703f0 ("eal/linux: fix parsing zero socket memory and limits")

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: David Marchand <david.marchand@redhat.com>

lib/eal/linux/eal.c

@@ -562,7 +562,6 @@ eal_parse_socket_arg(char *strval, volatile uint64_t *socket_arg)
 	char * arg[RTE_MAX_NUMA_NODES];
 	char *end;
 	int arg_num, i, len;
-	uint64_t total_mem = 0;
 
 	len = strnlen(strval, SOCKET_MEM_STRLEN);
 	if (len == SOCKET_MEM_STRLEN) {
@@ -594,7 +593,6 @@ eal_parse_socket_arg(char *strval, volatile uint64_t *socket_arg)
 				(arg[i][0] == '\0') || (end == NULL) || (*end != '\0'))
 			return -1;
 		val <<= 20;
-		total_mem += val;
 		socket_arg[i] = val;
 	}