removeUserSocket to delete socket.usid, not delete socket.skid

basesocket.js

@@ -102,17 +102,13 @@ module.exports = {
     return this
   },
 
-  removeUserSocket (data = {}) {
-    if (typeof data === 'string') {
-      // delete my.socketPool[usid]
-    } else if (typeof data === 'object') {
-      my.wsServer.clients.forEach((socket) => {
-        if (data.clid && socket.skid === data.clid) {
-          delete socket.skid
-          delete socket.usid
-        }
-      })
-    }
+  removeUserSocket ({ _clid } = {}) {
+    my.wsServer.clients.forEach((socket) => {
+      if ( _clid && socket.skid === _clid ) {
+        delete socket.usid
+        // 要不要清除 socket.? 似乎不清除也没问题
+      }
+    })
   },
 
   addListener (skevent, listener) {