Removed unused CSS

Also fixed one Edge webhint issue

WASMSerialTerminal/Shared/AutoScrollTextBox.razor

@@ -7,7 +7,7 @@ Now also has a button for clearing the received data, and an event is also raise
 @inject IJSRuntime jsRuntime
 
 <div class="d-flex flex-column" style="@Style">
-	<RadzenTextArea ReadOnly="true" Value="@terminalText" Style="white-space: pre; overflow-wrap: normal; overflow-x: scroll;" id="serial-text-output" class="w-100 h-100" />
+	<RadzenTextArea ReadOnly="true" Value="@terminalText" Style="white-space: pre; overflow-wrap: normal; overflow-x: scroll;" id="serial-text-output" class="w-100 h-100" aria-label="Serial data output" />
 
 	<div class="row">
 		<div class="col-12 col-sm-auto">

WASMSerialTerminal/Shared/MainLayout.razor

@@ -1,9 +1,5 @@
 @inherits LayoutComponentBase
 
-<div class="page">
-	<main>
-		<article class="content px-4">
-			@Body
-		</article>
-	</main>
-</div>
+<main class="content px-4">
+	@Body
+</main>

WASMSerialTerminal/Shared/MainLayout.razor.css

@@ -1,81 +1,3 @@
-.page {
-    position: relative;
-    display: flex;
-    flex-direction: column;
-}
-
-main {
-    flex: 1;
-}
-
-.sidebar {
-    background-image: linear-gradient(180deg, rgb(5, 39, 103) 0%, #3a0647 70%);
-}
-
-.top-row {
-    background-color: #f7f7f7;
-    border-bottom: 1px solid #d6d5d5;
-    justify-content: flex-end;
-    height: 3.5rem;
-    display: flex;
-    align-items: center;
-}
-
-    .top-row ::deep a, .top-row ::deep .btn-link {
-        white-space: nowrap;
-        margin-left: 1.5rem;
-        text-decoration: none;
-    }
-
-    .top-row ::deep a:hover, .top-row ::deep .btn-link:hover {
-        text-decoration: underline;
-    }
-
-    .top-row ::deep a:first-child {
-        overflow: hidden;
-        text-overflow: ellipsis;
-    }
-
-@media (max-width: 640.98px) {
-    .top-row:not(.auth) {
-        display: none;
-    }
-
-    .top-row.auth {
-        justify-content: space-between;
-    }
-
-    .top-row ::deep a, .top-row ::deep .btn-link {
-        margin-left: 0;
-    }
-}
-
-@media (min-width: 641px) {
-    .page {
-        flex-direction: row;
-    }
-
-    .sidebar {
-        width: 250px;
-        height: 100vh;
-        position: sticky;
-        top: 0;
-    }
-
-    .top-row {
-        position: sticky;
-        top: 0;
-        z-index: 1;
-    }
-
-    .top-row.auth ::deep a:first-child {
-        flex: 1;
-        text-align: right;
-        width: 0;
-    }
-
-    .top-row, article {
-        padding-left: 2rem !important;
-        padding-right: 1.5rem !important;
-    }
-}
+/* Empty file so that Blazor will still make the WASMSerialTerminal.styles.css file. */
+/* This means the stylesheet link to it (in index.html) doesn't get broken. */
+/* Could remove the link, but then if I actually use CSS in the future, I might forget to add the link back in. */