Remove AsyncResp from openHandler

This change, moving the openHandler back to only supporting websocket
disconnects and not 404s.Because AsyncResp is removed from openHandler.

Tested:
(from previous commit) Opened KVM in webui-vue and it works.

Signed-off-by: zhanghaicheng <zhanghch05@inspur.com>
Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: I793f05836aeccdc275b7aaaeede41b3a2c276595
diff --git a/include/kvm_websocket.hpp b/include/kvm_websocket.hpp
index d45d414..fa61b75 100644
--- a/include/kvm_websocket.hpp
+++ b/include/kvm_websocket.hpp
@@ -161,8 +161,7 @@
     BMCWEB_ROUTE(app, "/kvm/0")
         .privileges({{"ConfigureComponents", "ConfigureManager"}})
         .websocket()
-        .onopen([](crow::websocket::Connection& conn,
-                   const std::shared_ptr<bmcweb::AsyncResp>&) {
+        .onopen([](crow::websocket::Connection& conn) {
             BMCWEB_LOG_DEBUG << "Connection " << &conn << " opened";
 
             if (sessions.size() == maxSessions)