Removed custom tinymce helper

Was not required because SilverStripe can allow the developer to set their own `TinyMCEConfig::class` with any endpoint they see fit e.g. DataExtensions .

This helps negate overriding configs on existing projects and means we do not need to force custom tinymce configs.

src/Extensions/ContentReviewDefaultSettings.php

@@ -165,7 +165,7 @@ class ContentReviewDefaultSettings extends DataExtension
                 TextField::create('ReviewFrom', _t(__CLASS__ . '.EMAILFROM', 'From email address'))
                     ->setDescription(_t(__CLASS__ . '.EMAILFROM_RIGHTTITLE', 'e.g: do-not-reply@site.com')),
                 TextField::create('ReviewSubject', _t(__CLASS__ . '.EMAILSUBJECT', 'Subject line')),
-                $wysiwygConfig = HTMLEditorField::create(
+                HTMLEditorField::create(
                     'ReviewBody',
                     _t(__CLASS__ . '.EMAILTEMPLATE', 'Email template')
                 ),
@@ -175,41 +175,6 @@ class ContentReviewDefaultSettings extends DataExtension
                 ),
             ]
         );
-        $wysiwygConfig->setEditorConfig($this->getTinyMCEConfig($wysiwygConfig->getEditorConfig()));
-    }
-
-    /**
-     * Get the TinyMCEConfig that should be used for the email template preview
-     *
-     * @return TinyMCEConfig
-     */
-    private function getTinyMCEConfig(
-        TinyMCEConfig $config
-    ): TinyMCEConfig {
-        $editorButtonsGroupSeparator = '|';
-        $allowedEditorButtons = [
-            'undo',
-            'redo',
-            $editorButtonsGroupSeparator,
-            'bold',
-            'italic',
-            'underline',
-            $editorButtonsGroupSeparator,
-            'bullist',
-            'numlist',
-            $editorButtonsGroupSeparator,
-            'sslink',
-            $editorButtonsGroupSeparator,
-            'formatselect',
-            $editorButtonsGroupSeparator,
-            'code',
-        ];
-
-        $config->setButtonsForLine(1, $allowedEditorButtons);
-        $config->setButtonsForLine(2, []);
-        $config->setButtonsForLine(3, []);
-
-        return $config;
     }
 
     /**