removed deprecated loader interfaces

src/Loader/ArrayLoader.php

@@ -26,7 +26,7 @@ use Twig\Source;
  *
  * @author Fabien Potencier <fabien@symfony.com>
  */
-final class ArrayLoader implements LoaderInterface, ExistsLoaderInterface, SourceContextLoaderInterface
+final class ArrayLoader implements LoaderInterface
 {
     private $templates = [];
 

src/Loader/ChainLoader.php

@@ -18,7 +18,7 @@ use Twig\Error\LoaderError;
  *
  * @author Fabien Potencier <fabien@symfony.com>
  */
-final class ChainLoader implements LoaderInterface, ExistsLoaderInterface, SourceContextLoaderInterface
+final class ChainLoader implements LoaderInterface
 {
     private $hasSourceCache = [];
     private $loaders = [];

src/Loader/ExistsLoaderInterface.php

@@ -1,21 +0,0 @@
-<?php
-
-/*
- * This file is part of Twig.
- *
- * (c) Fabien Potencier
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Twig\Loader;
-
-/**
- * Empty interface for Twig 1.x compatibility.
- *
- * @deprecated since Twig 2.7, to be removed in 3.0
- */
-interface ExistsLoaderInterface extends LoaderInterface
-{
-}

src/Loader/FilesystemLoader.php

@@ -19,7 +19,7 @@ use Twig\Source;
  *
  * @author Fabien Potencier <fabien@symfony.com>
  */
-class FilesystemLoader implements LoaderInterface, ExistsLoaderInterface, SourceContextLoaderInterface
+class FilesystemLoader implements LoaderInterface
 {
     /** Identifier of the main namespace. */
     const MAIN_NAMESPACE = '__main__';

src/Loader/SourceContextLoaderInterface.php

@@ -1,19 +0,0 @@
-<?php
-
-/*
- * This file is part of Twig.
- *
- * (c) Fabien Potencier
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-namespace Twig\Loader;
-
-/**
- * Empty interface for Twig 1.x compatibility.
- */
-interface SourceContextLoaderInterface extends LoaderInterface
-{
-}