[chore] cleanup 'using' statements (#10144)

fix typo in comment

src/settings-ui/Microsoft.PowerToys.Settings.UI.Library/SettingsUtils.cs

@@ -54,7 +54,7 @@ namespace Microsoft.PowerToys.Settings.UI.Library
                 throw new FileNotFoundException();
             }
 
-            // Given the file already exists, to deserialize the file and read it's content.
+            // Given the file already exists, to deserialize the file and read its content.
             T deserializedSettings = GetFile<T>(powertoy, fileName);
 
             // If the file needs to be modified, to save the new configurations accordingly.

src/settings-ui/Microsoft.PowerToys.Settings.UI/Converters/ModuleEnabledToForegroundConverter.cs

@@ -3,8 +3,6 @@
 // See the LICENSE file in the project root for more information.
 
 using System;
-using System.Globalization;
-using Microsoft.PowerToys.Settings.UI.Library;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Data;
 using Windows.UI.Xaml.Media;

src/settings-ui/Microsoft.PowerToys.Settings.UI/Views/ColorPickerPage.xaml.cs

@@ -2,7 +2,6 @@
 // The Microsoft Corporation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-using System.IO.Abstractions;
 using Microsoft.PowerToys.Settings.UI.Library;
 using Microsoft.PowerToys.Settings.UI.Library.ViewModels;
 using Windows.UI.Xaml.Controls;