remove the unwanted code

Author: tineshkumarsf4652

PatientHealthMonitoring/PatientHealthMonitoring/MainWindow.xaml.cs

@@ -1,4 +1,3 @@
-using Microsoft.UI;
 using Microsoft.UI.Xaml;
 using Syncfusion.UI.Xaml.Editors;
 

PatientHealthMonitoring/PatientHealthMonitoring/Model/DataModel.cs

@@ -1,5 +1,4 @@
-
-using Microsoft.UI;
+using Microsoft.UI;
 using Microsoft.UI.Xaml.Media;
 using Windows.UI;
 

PatientHealthMonitoring/PatientHealthMonitoring/ViewModel/ViewModel.cs

@@ -5,7 +5,6 @@
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.ComponentModel;
-using System.Linq;
 using System.Runtime.CompilerServices;
 using Windows.UI;