remove navmenu page unused code.

samples/ControlCatalog.Web/Shared/NavMenu.razor

@@ -1,33 +0,0 @@
-<div class="top-row pl-4 navbar navbar-dark">
-    <a class="navbar-brand" href="">SkiaSharp on Blazor</a>
-    <button class="navbar-toggler" @onclick="ToggleNavMenu">
-        <span class="navbar-toggler-icon"></span>
-    </button>
-</div>
-
-<div class="@NavMenuCssClass" @onclick="ToggleNavMenu">
-    <ul class="nav flex-column">
-        <li class="nav-item px-3">
-            <NavLink class="nav-link" href="" Match="NavLinkMatch.All">
-                <span class="oi oi-home" aria-hidden="true"></span> Raster Canvas
-            </NavLink>
-        </li>
-        <li class="nav-item px-3">
-            <NavLink class="nav-link" href="gpu">
-                <span class="oi oi-plus" aria-hidden="true"></span> GPU Canvas
-            </NavLink>
-        </li>
-    </ul>
-</div>
-
-@code {
-    private bool collapseNavMenu = true;
-
-    private string? NavMenuCssClass =>
-        collapseNavMenu ? "collapse" : null;
-
-    private void ToggleNavMenu()
-    {
-        collapseNavMenu = !collapseNavMenu;
-    }
-}

samples/ControlCatalog.Web/Shared/NavMenu.razor.css

@@ -1,62 +0,0 @@
-.navbar-toggler {
-    background-color: rgba(255, 255, 255, 0.1);
-}
-
-.top-row {
-    height: 3.5rem;
-    background-color: rgba(0,0,0,0.4);
-}
-
-.navbar-brand {
-    font-size: 1.1rem;
-}
-
-.oi {
-    width: 2rem;
-    font-size: 1.1rem;
-    vertical-align: text-top;
-    top: -2px;
-}
-
-.nav-item {
-    font-size: 0.9rem;
-    padding-bottom: 0.5rem;
-}
-
-    .nav-item:first-of-type {
-        padding-top: 1rem;
-    }
-
-    .nav-item:last-of-type {
-        padding-bottom: 1rem;
-    }
-
-    .nav-item ::deep a {
-        color: #d7d7d7;
-        border-radius: 4px;
-        height: 3rem;
-        display: flex;
-        align-items: center;
-        line-height: 3rem;
-    }
-
-.nav-item ::deep a.active {
-    background-color: rgba(255,255,255,0.25);
-    color: white;
-}
-
-.nav-item ::deep a:hover {
-    background-color: rgba(255,255,255,0.1);
-    color: white;
-}
-
-@media (min-width: 641px) {
-    .navbar-toggler {
-        display: none;
-    }
-
-    .collapse {
-        /* Never collapse the sidebar for wide screens */
-        display: block;
-    }
-}