API Remove deprecated API

code/Controllers/CMSSiteTreeFilter.php

@@ -7,7 +7,6 @@
 use SilverStripe\Core\ClassInfo;
 use SilverStripe\Core\Convert;
 use SilverStripe\Core\Injector\Injectable;
-use SilverStripe\Dev\Deprecation;
 use SilverStripe\Forms\DateField;
 use SilverStripe\ORM\DataList;
 use SilverStripe\Model\List\SS_List;
@@ -116,7 +115,6 @@ public function getNumChildrenMethod()
 
     public function getRecordClasses($page)
     {
-        Deprecation::noticeWithNoReplacment('5.4.0', 'Will be renamed to getRecordClasses()');
         if ($this->_cache_ids === null) {
             $this->populateIDs();
         }
@@ -182,7 +180,6 @@ protected function populateIDs()
 
     public function isRecordIncluded($page)
     {
-        Deprecation::noticeWithNoReplacment('5.4.0', 'Will be renamed to isRecordIncluded()');
         if ($this->_cache_ids === null) {
             $this->populateIDs();
         }

code/Controllers/ContentController.php

@@ -27,7 +27,6 @@
 use SilverStripe\View\Parsers\URLSegmentFilter;
 use SilverStripe\View\Requirements;
 use SilverStripe\View\SSViewer;
-use SilverStripe\Dev\Deprecation;
 
 /**
  * The most common kind of controller; effectively a controller linked to a {@link DataObject}.

code/Model/SiteTree.php

@@ -128,18 +128,6 @@ class SiteTree extends DataObject implements PermissionProvider, i18nEntityProvi
      */
     private static $default_classname = Page::class;
 
-    /**
-     * If you extend a class, and don't want to be able to select the old class
-     * in the cms, set this to the old class name. Eg, if you extended Product
-     * to make ImprovedProduct, then you would set $hide_ancestor to Product.
-     *
-     * @deprecated 5.2.0 Use hide_pagetypes instead
-     *
-     * @config
-     * @var string
-     */
-    private static $hide_ancestor = null;
-
     /**
      * Any fully qualified class names added to this array will be hidden in the CMS
      * when selecting page types, e.g. for creating a new page or changing the type
@@ -485,21 +473,9 @@ public function updateAllowedSubClasses(array &$classes): void
             unset($classes[$baseClassIndex]);
         }
 
-        $kill_ancestors = SiteTree::config()->get('hide_pagetypes', Config::UNINHERITED) ?? [];
-
-        // figure out if there are any classes we don't want to appear
-        foreach ($classes as $class) {
-            $instance = singleton($class);
-
-            // do any of the progeny want to hide an ancestor?
-            if ($ancestor_to_hide = $instance->config()->get('hide_ancestor')) {
-                // note for killing later
-                $kill_ancestors[] = $ancestor_to_hide;
-            }
-        }
-
         // If any of the descendents don't want any of the elders to show up, cruelly render the elders surplus to
         // requirements
+        $kill_ancestors = SiteTree::config()->get('hide_pagetypes', Config::UNINHERITED) ?? [];
         if ($kill_ancestors) {
             $kill_ancestors = array_unique($kill_ancestors);
             foreach ($kill_ancestors as $mark) {

tests/php/Model/SiteTreeTest.php

@@ -1181,31 +1181,14 @@ public function testVersionsAreCreated()
 
     public function testHidePagetypes()
     {
-        SiteTree::config()->set('hide_pagetypes', ['Page']);
+        // Check with default config
         $classes = ClassInfo::getValidSubClasses(SiteTree::class);
         SiteTree::singleton()->updateAllowedSubClasses($classes);
-        $this->assertNotContains('Page', $classes);
-    }
+        $this->assertNotContains(SiteTree::class, $classes);
+        $this->assertContains('Page', $classes);
 
-    public function testPageTypeClasses()
-    {
-        $classes = ClassInfo::getValidSubClasses(SiteTree::class);
-        SiteTree::singleton()->updateAllowedSubClasses($classes);
-        $this->assertNotContains(SiteTree::class, $classes, 'Page types do not include base class');
-        $this->assertContains('Page', $classes, 'Page types do contain subclasses');
-
-        // Testing what happens in an incorrect config value is set - hide_ancestor should be a string
-        Config::modify()->set(SiteTreeTest_ClassA::class, 'hide_ancestor', true);
-        $newClasses = ClassInfo::getValidSubClasses(SiteTree::class);
-        SiteTree::singleton()->updateAllowedSubClasses($newClasses);
-        $this->assertEquals(
-            $classes,
-            $newClasses,
-            'Setting hide_ancestor to a boolean (incorrect) value caused a page class to be hidden'
-        );
-
-        // Testing what happens if a valid config value is set
-        Config::modify()->set(SiteTreeTest_ClassA::class, 'hide_ancestor', 'Page');
+        // Confirm specifying to hide the class makes it hidden
+        SiteTree::config()->set('hide_pagetypes', ['Page']);
         $classes = ClassInfo::getValidSubClasses(SiteTree::class);
         SiteTree::singleton()->updateAllowedSubClasses($classes);
         $this->assertNotContains('Page', $classes);