net/colo-compare.c: Remove duplicated code

Fix duplicated code:
https://bugs.launchpad.net/qemu/+bug/1811499Reviewed-by: NThomas Huth <thuth@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: NZhang Chen <chen.zhang@intel.com>
Signed-off-by: NJason Wang <jasowang@redhat.com>

net/colo-compare.c

@@ -286,14 +286,6 @@ static bool colo_mark_tcp_pkt(Packet *ppkt, Packet *spkt,
 {
     *mark = 0;
 
-    if (ppkt->tcp_seq == spkt->tcp_seq && ppkt->seq_end == spkt->seq_end) {
-        if (colo_compare_packet_payload(ppkt, spkt,
-                                        ppkt->header_size, spkt->header_size,
-                                        ppkt->payload_size)) {
-            *mark = COLO_COMPARE_FREE_SECONDARY | COLO_COMPARE_FREE_PRIMARY;
-            return true;
-        }
-    }
     if (ppkt->tcp_seq == spkt->tcp_seq && ppkt->seq_end == spkt->seq_end) {
         if (colo_compare_packet_payload(ppkt, spkt,
                                         ppkt->header_size, spkt->header_size,