Remove new form editor feature flag

[MAILPOET-2549]

tests/unit/Form/Util/StylesTest.php

@@ -2,25 +2,12 @@
 
 namespace MailPoet\Test\Form\Util;
 
-use MailPoet\Features\FeaturesController;
 use MailPoet\Form\Util\Styles;
 
 class StylesTest extends \MailPoetUnitTest {
 
-  /** @var FeaturesController&\PHPUnit_Framework_MockObject_MockObject */
-  private $featuresController;
-
-  public function _before() {
-    parent::_before();
-    $this->featuresController = $this->createMock(FeaturesController::class);
-    $this->featuresController
-      ->expects($this->any())
-      ->method('isSupported')
-      ->willReturn(false);
-  }
-
   public function testItSetsDefaultCSSStyles() {
-    $styles = new Styles($this->featuresController);
+    $styles = new Styles();
     expect($styles->getDefaultStyles())->notEmpty();
   }
 
@@ -29,7 +16,7 @@ class StylesTest extends \MailPoetUnitTest {
     /* some comment */
     input[name=first_name]    , input.some_class,     .some_class { color: red  ; background: blue; } .another_style { fonT-siZe: 20px                            }
     ';
-    $styleProcesser = new Styles($this->featuresController);
+    $styleProcesser = new Styles();
     $extractedAndPrefixedStyles = $styleProcesser->render($stylesheet, $prefix = 'mailpoet');
     // 1. comments should be stripped
     // 2. each selector should be refixed