Fixed more using directives

Author: Sergio0694

Microsoft.Toolkit.Uwp.Connectivity/BluetoothLEHelper/BluetoothLEHelper.cs

@@ -8,12 +8,11 @@
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
-using Microsoft.Toolkit.Uwp.Helpers;
+using Microsoft.Toolkit.Uwp.Extensions;
 using Windows.Devices.Bluetooth;
 using Windows.Devices.Bluetooth.Advertisement;
 using Windows.Devices.Enumeration;
 using Windows.System;
-using Microsoft.Toolkit.Uwp.Extensions;
 
 namespace Microsoft.Toolkit.Uwp.Connectivity
 {

Microsoft.Toolkit.Uwp.Connectivity/BluetoothLEHelper/ObservableBluetoothLEDevice.cs

@@ -11,14 +11,12 @@
 using System.Runtime.CompilerServices;
 using System.Threading;
 using System.Threading.Tasks;
-using Microsoft.Toolkit.Uwp.Helpers;
+using Microsoft.Toolkit.Uwp.Extensions;
 using Windows.Devices.Bluetooth;
 using Windows.Devices.Bluetooth.GenericAttributeProfile;
 using Windows.Devices.Enumeration;
 using Windows.System;
-using Windows.UI.Core;
 using Windows.UI.Xaml.Media.Imaging;
-using Microsoft.Toolkit.Uwp.Extensions;
 
 namespace Microsoft.Toolkit.Uwp.Connectivity
 {

Microsoft.Toolkit.Uwp.Connectivity/BluetoothLEHelper/ObservableGattCharacteristics.cs

@@ -7,13 +7,12 @@
 using System.Linq;
 using System.Runtime.CompilerServices;
 using System.Threading.Tasks;
-using Microsoft.Toolkit.Uwp.Helpers;
+using Microsoft.Toolkit.Uwp.Extensions;
 using Windows.Devices.Bluetooth;
 using Windows.Devices.Bluetooth.GenericAttributeProfile;
 using Windows.Security.Cryptography;
 using Windows.Storage.Streams;
 using Windows.System;
-using Microsoft.Toolkit.Uwp.Extensions;
 
 namespace Microsoft.Toolkit.Uwp.Connectivity
 {

Microsoft.Toolkit.Uwp.UI/Cache/ImageCache.cs

@@ -7,12 +7,10 @@
 using System.IO;
 using System.Reflection;
 using System.Threading.Tasks;
-using Microsoft.Toolkit.Uwp.Helpers;
+using Microsoft.Toolkit.Uwp.Extensions;
 using Windows.Storage;
-using Windows.Storage.Streams;
 using Windows.System;
 using Windows.UI.Xaml.Media.Imaging;
-using Microsoft.Toolkit.Uwp.Extensions;
 
 namespace Microsoft.Toolkit.Uwp.UI
 {

Microsoft.Toolkit.Uwp.UI/Extensions/ScrollViewer/ScrollViewerExtensions.MiddleClickScrolling.cs

@@ -4,7 +4,7 @@
 
 using System;
 using System.Threading;
-using Microsoft.Toolkit.Uwp.Helpers;
+using Microsoft.Toolkit.Uwp.Extensions;
 using Windows.Devices.Input;
 using Windows.Foundation;
 using Windows.System;
@@ -13,7 +13,6 @@
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
 using Windows.UI.Xaml.Input;
-using Microsoft.Toolkit.Uwp.Extensions;
 
 namespace Microsoft.Toolkit.Uwp.UI.Extensions
 {

Microsoft.Toolkit.Uwp.UI/Helpers/ThemeListener.cs

@@ -3,15 +3,13 @@
 // See the LICENSE file in the project root for more information.
 
 using System;
-using System.Diagnostics;
 using System.Runtime.CompilerServices;
 using System.Threading.Tasks;
-using Microsoft.Toolkit.Uwp.Helpers;
+using Microsoft.Toolkit.Uwp.Extensions;
 using Windows.Foundation.Metadata;
 using Windows.System;
 using Windows.UI.ViewManagement;
 using Windows.UI.Xaml;
-using Microsoft.Toolkit.Uwp.Extensions;
 
 [assembly: InternalsVisibleTo("UnitTests.XamlIslands.UWPApp")]