Remove unrelated global search index changes from Jenkins.java

The ConfigureLink.getSearchKeywords() already handles the "Search Settings"
box on the Manage Jenkins page. The code in Jenkins.java was adding items
to the global Jenkins search (header search box), which is a different
system and unrelated to the search settings fix.

Author: LakshyaBagani

core/src/main/java/jenkins/model/Jenkins.java

@@ -2431,12 +2431,6 @@ protected Iterable<TopLevelItem> allAsIterable() {
                     @Override
                     protected Collection<View> all() { return getAllViews(); }
                 });
-
-        // Add GlobalConfiguration items to search index so users can find configuration sections
-        for (Descriptor<?> d : Functions.getSortedDescriptorsForGlobalConfigUnclassifiedReadable()) {
-            builder.add("/manage/configure", d.getDisplayName());
-        }
-
         return builder;
     }