CLEANUP: mux-quic: remove unused QC_CF_CC_RECV

This flag was used to notify the MUX about a CONNECTION_CLOSE frame
reception. It is now unused on the MUX side and can be removed. A new
mechanism to detect quic-conn closing will be soon implemented.
diff --git a/include/haproxy/mux_quic-t.h b/include/haproxy/mux_quic-t.h
index ab2b952..61ff95a 100644
--- a/include/haproxy/mux_quic-t.h
+++ b/include/haproxy/mux_quic-t.h
@@ -23,8 +23,7 @@
 	QCS_MAX_TYPES
 };
 
-#define QC_CF_CC_RECV   0x00000001
-#define QC_CF_BLK_MFCTL 0x00000002 /* sending blocked due to connection flow-control */
+#define QC_CF_BLK_MFCTL 0x00000001 /* sending blocked due to connection flow-control */
 
 struct qcc {
 	struct connection *conn;
diff --git a/src/xprt_quic.c b/src/xprt_quic.c
index a1fb283..8757d9d 100644
--- a/src/xprt_quic.c
+++ b/src/xprt_quic.c
@@ -2591,11 +2591,6 @@
 				qc_idle_timer_do_rearm(qc);
 				qc->flags |= QUIC_FL_CONN_DRAINING|QUIC_FL_CONN_IMMEDIATE_CLOSE;
 			}
-			/* warn the mux to close the connection */
-			if (qc->mux_state == QC_MUX_READY) {
-				qc->qcc->flags |= QC_CF_CC_RECV;
-				tasklet_wakeup(qc->qcc->wait_event.tasklet);
-			}
 			break;
 		case QUIC_FT_HANDSHAKE_DONE:
 			if (qc_is_listener(ctx->qc))