Polish redundant code

pass/Controllers/AdvancedSettingsTableViewController.swift

@@ -51,12 +51,10 @@ class AdvancedSettingsTableViewController: UITableViewController {
                             }
                             SVProgressHUD.dismiss(withDelay: 1)
                         } catch {
-                            DispatchQueue.main.async {
                             Utils.alert(title: "Error", message: error.localizedDescription, controller: self, completion: nil)
                         }
                     }
                 }
-                }
                 
             }))
             alert.addAction(UIAlertAction(title: "Dismiss", style: UIAlertActionStyle.cancel, handler:nil))