Initial commit: is_shoppingcart out of the box. V3.0.1

is_shoppingcart/upgrade/upgrade-1-1-0.php

@@ -0,0 +1,13 @@
+<?php
+
+if (!defined('_PS_VERSION_')) {
+    exit;
+}
+
+function upgrade_module_1_1_0($module)
+{
+    $module->registerHook('displayHeader');
+    $module->unregisterHook('header');
+
+    return true;
+}