Revert "Add bootstrap and basic layout"

This reverts commit 2ab583cb17.

Hcs.WebApp/Components/Layout/MainLayout.razor

@@ -1,16 +1,6 @@
 @inherits LayoutComponentBase
 
-<div class="page">
-    <div class="sidebar">
-        <NavMenu />
-    </div>
-
-    <main>
-        <article class="content px-4">
-            @Body
-        </article>
-    </main>
-</div>
+@Body
 
 <div id="blazor-error-ui">
     An unhandled error has occurred