Remove $supportedFeatureSetVersion static properties from form-related tests

Author: nicolas-grekas

Tests/Extension/AbstractBootstrap3LayoutTest.php

@@ -17,8 +17,6 @@
 
 abstract class AbstractBootstrap3LayoutTest extends AbstractLayoutTest
 {
-    protected static $supportedFeatureSetVersion = 404;
-
     public function testLabelOnForm()
     {
         $form = $this->factory->createNamed('name', 'Symfony\Component\Form\Extension\Core\Type\DateType');

Tests/Extension/FormExtensionDivLayoutTest.php

@@ -32,8 +32,6 @@ class FormExtensionDivLayoutTest extends AbstractDivLayoutTest
      */
     private $renderer;
 
-    protected static $supportedFeatureSetVersion = 404;
-
     protected function setUp(): void
     {
         parent::setUp();

Tests/Extension/FormExtensionTableLayoutTest.php

@@ -31,8 +31,6 @@ class FormExtensionTableLayoutTest extends AbstractTableLayoutTest
      */
     private $renderer;
 
-    protected static $supportedFeatureSetVersion = 404;
-
     protected function setUp(): void
     {
         parent::setUp();