MDL-9647 simplify dealing with headers/footers in admin sections

admin/module.php

@@ -3,8 +3,8 @@
 
     require_once('../config.php');
     require_once($CFG->libdir.'/adminlib.php');
-    $adminroot = admin_get_root();
-    admin_externalpage_setup('managemodules', $adminroot);
+
+    admin_externalpage_setup('managemodules');
 
 /// If data submitted, then process and store.
 
@@ -51,7 +51,7 @@
     // of the page. It is also used to generate the link to the Moodle Docs for this view.
     $CFG->pagepath = 'mod/' . $module . '/config';
 
-    admin_externalpage_print_header($adminroot);
+    admin_externalpage_print_header();
 
     print_heading($strmodulename);
 
@@ -62,6 +62,6 @@
     include("$CFG->dirroot/mod/$module/config.html");
     print_simple_box_end();
 
-    admin_externalpage_print_footer($adminroot);
+    admin_externalpage_print_footer();
 
 ?>