Drop deprecated GraphQL\Schema

UPGRADE.md

@@ -1,3 +1,8 @@
+## Master
+
+### Breaking (major): dropped deprecations
+ - dropped deprecated `GraphQL\Schema`. Use `GraphQL\Type\Schema`.
+
 ## Upgrade v0.12.x > v0.13.x
 
 ### Breaking (major): minimum supported version of PHP

src/Schema.php

@@ -1,22 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace GraphQL;
-
-use function trigger_error;
-use const E_USER_DEPRECATED;
-
-trigger_error(
-    'GraphQL\Schema is moved to GraphQL\Type\Schema',
-    E_USER_DEPRECATED
-);
-
-/**
- * Schema Definition
- *
- * @deprecated moved to GraphQL\Type\Schema
- */
-class Schema extends \GraphQL\Type\Schema
-{
-}