Remove unwanted z-index change

GuillaumeGomez · web-flow · commit 4fed94bf0dcb · 2019-04-17T10:42:10.000+02:00
diff --git a/src/librustdoc/html/static/rustdoc.css b/src/librustdoc/html/static/rustdoc.css
@@ -166,7 +166,6 @@ nav.sub {
 	top: 0;
 	height: 100vh;
 	overflow: auto;
-	z-index: 1;
 }
 
 .sidebar .block > ul > li {
