Removed unreferenced resources from TextBox

src/Avalonia.Themes.Fluent/Controls/TextBox.xaml

@@ -1,4 +1,4 @@
-<ResourceDictionary xmlns="https://github.com/avaloniaui"
+<ResourceDictionary xmlns="https://github.com/avaloniaui"
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
   <Design.PreviewWith>
     <Border Padding="20">
@@ -26,12 +26,6 @@
     <MenuItem x:Name="TextBoxContextFlyoutPasteItem" Header="Paste" Command="{Binding $parent[TextBox].Paste}" IsEnabled="{Binding $parent[TextBox].CanPaste}" InputGesture="{x:Static TextBox.PasteGesture}"/>
   </MenuFlyout>
 
-  <ContextMenu x:Key="DefaultTextBoxContextMenu" x:Name="TextBoxContextMenu">
-    <MenuItem x:Name="TextBoxContextMenuCutItem" Header="Cut" Command="{Binding $parent[TextBox].Cut}" IsEnabled="{Binding $parent[TextBox].CanCut}" InputGesture="{x:Static TextBox.CutGesture}" />
-    <MenuItem x:Name="TextBoxContextMenuCopyItem" Header="Copy" Command="{Binding $parent[TextBox].Copy}" IsEnabled="{Binding $parent[TextBox].CanCopy}" InputGesture="{x:Static TextBox.CopyGesture}"/>
-    <MenuItem x:Name="TextBoxContextMenuPasteItem" Header="Paste" Command="{Binding $parent[TextBox].Paste}" IsEnabled="{Binding $parent[TextBox].CanPaste}" InputGesture="{x:Static TextBox.PasteGesture}"/>
-  </ContextMenu>
-
   <ControlTheme x:Key="FluentTextBoxButton" TargetType="Button">
     <Setter Property="Background" Value="{DynamicResource TextControlButtonBackground}" />
     <Setter Property="BorderBrush" Value="{DynamicResource TextControlButtonBorderBrush}" />

src/Avalonia.Themes.Simple/Controls/TextBox.xaml

@@ -13,15 +13,6 @@
               IsEnabled="{Binding $parent[TextBox].CanPaste}" InputGesture="{x:Static TextBox.PasteGesture}" />
   </MenuFlyout>
 
-  <ContextMenu x:Key="SimpleTextBoxContextMenu" x:Name="TextBoxContextMenu">
-    <MenuItem x:Name="TextBoxContextMenuCutItem" Header="Cut" Command="{Binding $parent[TextBox].Cut}"
-              IsEnabled="{Binding $parent[TextBox].CanCut}" InputGesture="{x:Static TextBox.CutGesture}" />
-    <MenuItem x:Name="TextBoxContextMenuCopyItem" Header="Copy" Command="{Binding $parent[TextBox].Copy}"
-              IsEnabled="{Binding $parent[TextBox].CanCopy}" InputGesture="{x:Static TextBox.CopyGesture}" />
-    <MenuItem x:Name="TextBoxContextMenuPasteItem" Header="Paste" Command="{Binding $parent[TextBox].Paste}"
-              IsEnabled="{Binding $parent[TextBox].CanPaste}" InputGesture="{x:Static TextBox.PasteGesture}" />
-  </ContextMenu>
-
   <ControlTheme x:Key="SimpleTextBoxClearButtonTheme"
                 BasedOn="{StaticResource {x:Type Button}}"
                 TargetType="Button">