Remove unused navmenu Demo project

Author: TDroogers

Demo/ExpireStorage.Demo/Layout/MainLayout.razor

@@ -7,7 +7,6 @@
 
 <MudLayout>
     <MudAppBar Elevation="1">
-        <MudIconButton Icon="@Icons.Material.Filled.Menu" Color="Color.Inherit" Edge="Edge.Start" OnClick="@DrawerToggle" />
         <MudText Typo="Typo.h6" Class="ml-2">ExpireStorage</MudText>
         <MudSpacer />
         <Theming MudThemeProvider="@_mudThemeProvider" @bind-IsDarkMode="_isDarkMode" />
@@ -19,7 +18,6 @@
 </MudLayout>
 
 @code {
-    private bool _drawerOpen;
     private bool _isDarkMode;
     private MudTheme? _theme;
     private MudThemeProvider? _mudThemeProvider;
@@ -36,11 +34,6 @@
         };
     }
 
-    private void DrawerToggle()
-    {
-        _drawerOpen = !_drawerOpen;
-    }
-
     private readonly PaletteLight _lightPalette = new()
     {
         Black = "#110e2d",