Revert "feat: 把 A 端的 Session/KCP/视频/控制 都收口到一个本地 daemon 进程里，Django 和输入发送端都改成通过本机 UDS HTTP 去访问它，同时补齐了观测、性能和可用性上的几个关键问题。"

This reverts commit 2f2c2008e7.

third_party/kcp/ikcp.c

@@ -298,10 +298,6 @@ ikcpcb *ikcp_create(IUINT32 conv, void *user)
     kcp->fastlimit = IKCP_FASTACK_LIMIT;
     kcp->nocwnd = 0;
     kcp->xmit = 0;
-    kcp->fast_retrans_xmit = 0;
-    kcp->early_retrans_xmit = 0;
-    kcp->lost_xmit = 0;
-    kcp->repeat_xmit = 0;
     kcp->dead_link = IKCP_DEADLINK;
     kcp->output = NULL;
     kcp->writelog = NULL;
@@ -792,7 +788,6 @@ void ikcp_parse_data(ikcpcb *kcp, IKCPSEG *newseg)
     }
     else
     {
-        kcp->repeat_xmit++;
         ikcp_segment_delete(kcp, newseg);
     }
 
@@ -1197,7 +1192,6 @@ void ikcp_flush(ikcpcb *kcp)
             needsend = 1;
             segment->xmit++;
             kcp->xmit++;
-            kcp->lost_xmit++;
             if (kcp->nodelay == 0)
             {
                 segment->rto += _imax_(segment->rto, (IUINT32)kcp->rx_rto);
@@ -1217,7 +1211,6 @@ void ikcp_flush(ikcpcb *kcp)
             {
                 needsend = 1;
                 segment->xmit++;
-                kcp->fast_retrans_xmit++;
                 segment->fastack = 0;
                 segment->resendts = current + segment->rto;
                 change++;