API Stop using deprecated API

_config.php

@@ -1,6 +1,5 @@
 <?php
 
-use SilverStripe\Dev\Deprecation;
 use SilverStripe\View\Shortcodes\EmbedShortcodeProvider;
 use SilverStripe\View\Parsers\ShortcodeParser;
 
@@ -14,6 +13,3 @@
 
 ShortcodeParser::get('default')
     ->register('embed', [EmbedShortcodeProvider::class, 'handle_shortcode']);
-
-// Set to 5.0.0 to show APIs marked for removal at that version
-Deprecation::notification_version('4.0.0');

_config/i18n.yml

@@ -2,14 +2,14 @@
 Name: basei18n
 Before: '#defaulti18n'
 ---
-SilverStripe\i18n\Data\Sources:
+SilverStripe\Core\Manifest\ModuleManifest:
   module_priority:
     - silverstripe\admin
     - silverstripe\framework
 ---
 Name: defaulti18n
 ---
-SilverStripe\i18n\Data\Sources:
+SilverStripe\Core\Manifest\ModuleManifest:
   module_priority:
     - other_modules
 ---

src/Control/CookieJar.php

@@ -200,12 +200,9 @@ private function cookieIsSecure(string $sameSite, bool $secure): bool
 
     /**
      * Get the correct samesite value - Session cookies use a different configuration variable.
-     *
-     * @deprecated 4.12.0 The relevant methods will include a `$sameSite` parameter instead.
      */
     private function getSameSite(string $name): string
     {
-        Deprecation::notice('4.12.0', 'The relevant methods will include a `$sameSite` parameter instead.');
         if ($name === session_name()) {
             return Session::config()->get('cookie_samesite');
         }

src/Control/Director.php

@@ -228,7 +228,7 @@ public static function mockRequest(
             ? $cookies
             : Injector::inst()->createWithArgs(Cookie_Backend::class, [$cookies ?: []]);
         $newVars['_COOKIE'] = $cookieJar->getAll(false);
-        Cookie::config()->update('report_errors', false);
+        Cookie::config()->set('report_errors', false);
         Injector::inst()->registerService($cookieJar, Cookie_Backend::class);
 
         // Backup requirements