[6.x] Remove deprecated blacklist (#45722)

Removes code deprecated in favour of forbiddenlist

Original PR with explanation of the deprecation #32030

Author: brianteeman

libraries/src/MVC/Model/ListModel.php

@@ -89,16 +89,6 @@ class ListModel extends BaseDatabaseModel implements FormFactoryAwareInterface,
      */
     protected $htmlFormName = 'adminForm';
 
-    /**
-     * A list of filter variables to not merge into the model's state
-     *
-     * @var        array
-     * @since      3.4.5
-     * @deprecated  4.0 will be removed in 6.0
-     *              Use $filterForbiddenList instead
-     */
-    protected $filterBlacklist = [];
-
     /**
      * A list of forbidden filter variables to not merge into the model's state
      *
@@ -107,16 +97,6 @@ class ListModel extends BaseDatabaseModel implements FormFactoryAwareInterface,
      */
     protected $filterForbiddenList = [];
 
-    /**
-     * A list of forbidden variables to not merge into the model's state
-     *
-     * @var        array
-     * @since      3.4.5
-     * @deprecated  4.0 will be removed in 6.0
-     *              Use $listForbiddenList instead
-     */
-    protected $listBlacklist = ['select'];
-
     /**
      * A list of forbidden variables to not merge into the model's state
      *
@@ -147,22 +127,6 @@ public function __construct($config = [], ?MVCFactoryInterface $factory = null)
         if (empty($this->context)) {
             $this->context = strtolower($this->option . '.' . $this->getName());
         }
-
-        /**
-         * @deprecated  4.0 will be removed in 6.0
-         *              Use $this->filterForbiddenList instead
-         */
-        if (!empty($this->filterBlacklist)) {
-            $this->filterForbiddenList = array_merge($this->filterBlacklist, $this->filterForbiddenList);
-        }
-
-        /**
-         * @deprecated  4.0 will be removed in 6.0
-         *              Use $this->listForbiddenList instead
-         */
-        if (!empty($this->listBlacklist)) {
-            $this->listForbiddenList = array_merge($this->listBlacklist, $this->listForbiddenList);
-        }
     }
 
     /**