Remove methods related to partial clearing

UPGRADE.md

@@ -8,6 +8,12 @@ awareness about deprecated code.
 
 # Upgrade to 3.0
 
+## Removed `OnClearEventArgs::clearsAllEntities()` and `OnClearEventArgs::getEntityClass()`
+
+These methods only make sense when partially clearing the object manager, which
+is no longer possible.
+The second argument of the constructor of `OnClearEventArgs` is removed as well.
+
 ## BC Break: removed `ObjectManagerAware`
 
 Implement active record style functionality directly in your application, by

src/Persistence/Event/OnClearEventArgs.php

@@ -5,11 +5,8 @@
 namespace Doctrine\Persistence\Event;
 
 use Doctrine\Common\EventArgs;
-use Doctrine\Deprecations\Deprecation;
 use Doctrine\Persistence\ObjectManager;
 
-use function func_num_args;
-
 /**
  * Provides event arguments for the onClear event.
  */
@@ -18,26 +15,12 @@ class OnClearEventArgs extends EventArgs
     /** @var ObjectManager */
     private $objectManager;
 
-    /** @var string|null */
-    private $entityClass;
-
     /**
      * @param ObjectManager $objectManager The object manager.
-     * @param string|null   $entityClass   The optional entity class.
      */
-    public function __construct(ObjectManager $objectManager, ?string $entityClass = null)
+    public function __construct(ObjectManager $objectManager)
     {
-        if (func_num_args() > 1) {
-            Deprecation::trigger(
-                'doctrine/persistence',
-                'https://github.com/doctrine/persistence/pull/270',
-                'The second argument of %s is deprecated and will be removed in 3.0.',
-                __METHOD__
-            );
-        }
-
         $this->objectManager = $objectManager;
-        $this->entityClass   = $entityClass;
     }
 
     /**
@@ -49,40 +32,4 @@ public function getObjectManager()
     {
         return $this->objectManager;
     }
-
-    /**
-     * @deprecated no replacement planned
-     * Returns the name of the entity class that is cleared, or null if all are cleared.
-     *
-     * @return string|null
-     */
-    public function getEntityClass()
-    {
-        Deprecation::trigger(
-            'doctrine/persistence',
-            'https://github.com/doctrine/persistence/pull/270',
-            '%s is deprecated and will be removed in 3.0',
-            __METHOD__
-        );
-
-        return $this->entityClass;
-    }
-
-    /**
-     * @deprecated no replacement planned
-     * Returns whether this event clears all entities.
-     *
-     * @return bool
-     */
-    public function clearsAllEntities()
-    {
-        Deprecation::trigger(
-            'doctrine/persistence',
-            'https://github.com/doctrine/persistence/pull/270',
-            '%s is deprecated and will be removed in 3.0',
-            __METHOD__
-        );
-
-        return $this->entityClass === null;
-    }
 }