Hide the sidebar resize handle when scripting isn't available

Author: LikeLakers2

crates/mdbook-html/front-end/css/chrome.css

@@ -534,6 +534,11 @@ html:not(.sidebar-resizing) .sidebar {
     cursor: col-resize;
     width: calc(var(--sidebar-resize-indicator-width) - var(--sidebar-resize-indicator-space));
 }
+
+html:not(.js) .sidebar-resize-handle {
+    display: none;
+}
+
 /* sidebar-hidden */
 #mdbook-sidebar-toggle-anchor:not(:checked) ~ .sidebar {
     transform: translateX(calc(0px - var(--sidebar-width) - var(--sidebar-resize-indicator-width)));