refactor: Remove deprecated View::$currentSection

Author: neznaika0

Diff for: system/View/View.php

@@ -124,16 +124,6 @@ class View implements RendererInterface
      */
     protected $sections = [];
 
-    /**
-     * The name of the current section being rendered,
-     * if any.
-     *
-     * @var string|null
-     *
-     * @deprecated
-     */
-    protected $currentSection;
-
     /**
      * The name of the current section being rendered,
      * if any.
@@ -420,8 +410,6 @@ public function extend(string $layout)
      */
     public function section(string $name)
     {
-        // Saved to prevent BC.
-        $this->currentSection = $name;
         $this->sectionStack[] = $name;
 
         ob_start();