Documentation: theme: css: Really hide toc trees

The toc trees are rendered as hidden but still take space due to their
margin and padding. Really hide them. While at it, don't handle overflow
with scrollbars in the content area, the whole page should be
scrollable.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

Documentation/theme/static/css/theme.css

@@ -204,7 +204,6 @@ div#content {
 	padding-bottom: 50px;
 	margin-left: 0px;
 	margin-right: 0px;
-	overflow: auto;
 }
 
 div#content > div.block {
@@ -283,5 +282,8 @@ div#signature {
 }
 
 #libcamera div.toctree-wrapper {
+	height: 0px;
+	margin: 0px;
+	padding: 0px;
 	visibility: hidden;
 }