diff --git a/src/Forms/Control.php b/src/Forms/Control.php
index 29404edda..101cc3955 100644
--- a/src/Forms/Control.php
+++ b/src/Forms/Control.php
@@ -40,6 +40,3 @@ function getErrors(): array;
 	 */
 	function isOmitted(): bool;
 }
-
-
-interface_exists(IControl::class);
diff --git a/src/Forms/FormRenderer.php b/src/Forms/FormRenderer.php
index 8db0b7d3a..fdb9eb791 100644
--- a/src/Forms/FormRenderer.php
+++ b/src/Forms/FormRenderer.php
@@ -20,6 +20,3 @@ interface FormRenderer
 	 */
 	function render(Form $form): string;
 }
-
-
-interface_exists(IFormRenderer::class);
diff --git a/src/Forms/SubmitterControl.php b/src/Forms/SubmitterControl.php
index e59f87cda..228745688 100644
--- a/src/Forms/SubmitterControl.php
+++ b/src/Forms/SubmitterControl.php
@@ -20,6 +20,3 @@ interface SubmitterControl extends Control
 	 */
 	function getValidationScope(): ?array;
 }
-
-
-interface_exists(ISubmitterControl::class);
diff --git a/src/compatibility.php b/src/compatibility.php
deleted file mode 100644
index dd9c45ee5..000000000
--- a/src/compatibility.php
+++ /dev/null
@@ -1,37 +0,0 @@
-<?php
-
-/**
- * This file is part of the Nette Framework (https://nette.org)
- * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
- */
-
-declare(strict_types=1);
-
-namespace Nette\Forms;
-
-if (false) {
-	/** @deprecated use Nette\Forms\Control */
-	interface IControl extends Control
-	{
-	}
-} elseif (!interface_exists(IControl::class)) {
-	class_alias(Control::class, IControl::class);
-}
-
-if (false) {
-	/** @deprecated use Nette\Forms\FormRenderer */
-	interface IFormRenderer extends FormRenderer
-	{
-	}
-} elseif (!interface_exists(IFormRenderer::class)) {
-	class_alias(FormRenderer::class, IFormRenderer::class);
-}
-
-if (false) {
-	/** @deprecated use Nette\Forms\SubmitterControl */
-	interface ISubmitterControl extends SubmitterControl
-	{
-	}
-} elseif (!interface_exists(ISubmitterControl::class)) {
-	class_alias(SubmitterControl::class, ISubmitterControl::class);
-}