fix: remove missing CountToVisibilityConverter reference

Author: lxhtt

MCServerLauncher.WPF/View/Pages/InstanceManagerPage.xaml

@@ -155,7 +155,7 @@
                    VerticalAlignment="Top" HorizontalAlignment="Left" Margin="0,10,0,0"/>
 
         <!-- 批量操作栏 -->
-        <Grid Grid.Row="2" Margin="0,10,0,0" x:Name="BatchOperationBar" Visibility="{Binding SelectedCount, Converter={StaticResource CountToVisibilityConverter}, FallbackValue=Collapsed}">
+        <Grid Grid.Row="2" Margin="0,10,0,0" x:Name="BatchOperationBar" Visibility="Collapsed">
             <Border Background="{DynamicResource SystemControlBackgroundAccentBrush}"
                     CornerRadius="4" Padding="15,10">
                 <Grid>