refactor(view): remove redundant template path generation

- Remove unnecessary code that generates a template path based on the request pathinfo
- Simplify the render function by removing the conditional block that sets the template path

app/common/controller/AdminController.php

@@ -133,9 +133,6 @@ class AdminController extends BaseController
     {
         if ($layout) View::instance()->engine()->layout('/layout/default');
         View::assign($vars);
-        if (empty($template)) {
-            $template = strtolower(str_replace('.', '/', $this->request->pathinfo()));
-        }
         return View::fetch($template);
     }