Rollup merge of #48381 - GuillaumeGomez:rustdoc-theme-securities, r=QuietMisdreavus

Rustdoc theme securities

Fixes #48375.
Fixes #48376.

r? @steveklabnik
cc @QuietMisdreavus

src/librustdoc/html/static/main.js

@@ -96,14 +96,6 @@
         }
     }
 
-    function onEach(arr, func) {
-        if (arr && arr.length > 0 && func) {
-            for (var i = 0; i < arr.length; i++) {
-                func(arr[i]);
-            }
-        }
-    }
-
     function isHidden(elem) {
         return (elem.offsetParent === null)
     }