refactor(frontend): removed legacy ping backend

issue #1023

public/js/admin.js

@@ -116,9 +116,6 @@ ravadaApp.directive("solShowMachine", swMach)
   };
 
   function machinesPageC($scope, $http, $interval, $timeout, request, listMach) {
-    $http.get('/pingbackend.json').then(function(response) {
-      $scope.pingbe_fail = !response.data;
-    });
         if( $scope.check_netdata && $scope.check_netdata != "0" ) {
             var url = $scope.check_netdata;
             $scope.check_netdata = 0;
@@ -299,9 +296,6 @@ ravadaApp.directive("solShowMachine", swMach)
   };
 
   function usersPageC($scope, $http, $interval, request) {
-    $http.get('/pingbackend.json').then(function(response) {
-      $scope.pingbe_fail = !response.data;
-    });
     $scope.action = function(target,action,machineId){
       $http.get('/'+target+'/'+action+'/'+machineId+'.json');
     };
@@ -309,9 +303,6 @@ ravadaApp.directive("solShowMachine", swMach)
   };
 
   function messagesPageC($scope, $http, $interval, request) {
-    $http.get('/pingbackend.json').then(function(response) {
-      $scope.pingbe_fail = !response.data;
-    });
     $scope.getMessages = function() {
       $http.get('/messages.json').then(function(response) {
         $scope.list_message= response.data;

public/js/ravada.js

@@ -243,9 +243,6 @@
           };
           $scope.domain_remove = 0;
           $scope.new_name_invalid = false;
-          $http.get('/pingbackend.json').then(function(response) {
-            $scope.pingbe_fail = !response.data;
-          });
           $scope.machine_info = function(id) {
                $http.get('/machine/info/'+$scope.showmachineId+'.json')
                     .then(function(response) {