eve/anomaly: don't add timestamp twice

Timestamp is added unconditionally by CreateEveHeader(), so no need
to have a local timestamp in case of non-IP packets.

src/output-json-anomaly.c

@@ -88,13 +88,10 @@ static int AnomalyDecodeEventJson(ThreadVars *tv, JsonAnomalyLogThread *aft,
                                   const Packet *p)
 {
     const bool is_ip_pkt = PKT_IS_IPV4(p) || PKT_IS_IPV6(p);
-
-    char timebuf[64];
-    CreateIsoTimeString(&p->ts, timebuf, sizeof(timebuf));
-
     const uint16_t log_type = aft->json_output_ctx->flags;
     const bool log_stream = log_type & LOG_JSON_STREAM_TYPE;
     const bool log_decode = log_type & LOG_JSON_DECODE_TYPE;
+
     for (int i = 0; i < p->events.cnt; i++) {
         uint8_t event_code = p->events.events[i];
         bool is_decode = EVENT_IS_DECODER_PACKET_ERROR(event_code);
@@ -112,9 +109,7 @@ static int AnomalyDecodeEventJson(ThreadVars *tv, JsonAnomalyLogThread *aft,
 
         jb_open_object(js, ANOMALY_EVENT_TYPE);
 
-        if (!is_ip_pkt) {
-            jb_set_string(js, "timestamp", timebuf);
-        } else {
+        if (is_ip_pkt) {
             EveAddCommonOptions(&aft->json_output_ctx->cfg, p, p->flow, js);
         }