bug fix

manager.js

@@ -67,17 +67,15 @@ const manager =  function(process){
     });
   };
   t.saveShutdown = function(){
-    return new Promise((res,rej)=>{
-      t.shutdown().then(()=>{
+    t.shutdown().then(() => {
       setTimeout(function() { //some save time
         process.exit();
       }, 1000);
-      }).catch(()=>{
+    }).catch(() => {
       setTimeout(function() { //shutdown on error with more save time
         process.exit();
       }, 10000);
     });
-    });
   }
 }
 export default manager;