diff --git a/administrator/components/com_admin/script.php b/administrator/components/com_admin/script.php
index 63a89704f86a6..09ebb9d6b1cdb 100644
--- a/administrator/components/com_admin/script.php
+++ b/administrator/components/com_admin/script.php
@@ -9,7 +9,6 @@
 
 defined('_JEXEC') or die;
 
-use Joomla\CMS\Component\ComponentHelper;
 use Joomla\CMS\Extension\ExtensionHelper;
 use Joomla\CMS\Factory;
 use Joomla\CMS\Filesystem\File;
@@ -18,8 +17,6 @@
 use Joomla\CMS\Language\Text;
 use Joomla\CMS\Log\Log;
 use Joomla\CMS\Table\Table;
-use Joomla\CMS\Uri\Uri;
-use Joomla\Component\Config\Administrator\Model\ComponentModel;
 use Joomla\Component\Fields\Administrator\Model\FieldModel;
 use Joomla\Database\ParameterType;
 
@@ -6742,8 +6739,6 @@ public function postflight($action, $installer)
 			}
 		}
 
-		$this->convertBlogLayouts();
-
 		return true;
 	}
 
@@ -7106,154 +7101,6 @@ private function updateContentTypes(): void
 		}
 	}
 
-	/**
-	 * Converts layout parameters for blog / featured views into the according CSS classes.
-	 *
-	 * @return void
-	 *
-	 * @since 4.0.0
-	 */
-	private function convertBlogLayouts()
-	{
-		$db = Factory::getDbo();
-		$query = $db->getQuery(true)
-			->select(
-				[
-					$db->quoteName('m.id'),
-					$db->quoteName('m.link'),
-					$db->quoteName('m.params'),
-				]
-			)
-			->from($db->quoteName('#__menu', 'm'))
-			->leftJoin($db->quoteName('#__extensions', 'e'), $db->quoteName('e.extension_id') . ' = ' . $db->quoteName('m.component_id'))
-			->where($db->quoteName('e.element') . ' = ' . $db->quote('com_content'));
-
-		$menuItems = $db->setQuery($query)->loadAssocList('id');
-		$contentParams = ComponentHelper::getParams('com_content');
-
-		foreach ($menuItems as $id => $menuItem)
-		{
-			$view = Uri::getInstance($menuItem['link'])->getVar('view');
-
-			if (!in_array($view, ['category', 'categories', 'featured']))
-			{
-				continue;
-			}
-
-			$params = json_decode($menuItem['params'], true);
-
-			// Don't update parameters if num_columns is unset.
-			if (!isset($params['num_columns']))
-			{
-				continue;
-			}
-
-			$useLocalCols = $params['num_columns'] !== '';
-
-			if ($useLocalCols)
-			{
-				$nColumns = (int) $params['num_columns'];
-			}
-			else
-			{
-				$nColumns = (int) $contentParams->get('num_columns', '1');
-			}
-
-			unset($params['num_columns']);
-
-			$order = 0;
-			$useLocalOrder = false;
-
-			if (isset($params['multi_column_order']))
-			{
-				if ($params['multi_column_order'] !== '')
-				{
-					$useLocalOrder = true;
-					$order = (int) $params['multi_column_order'];
-				}
-				else
-				{
-					$order = (int) $contentParams->get('multi_column_order', '0');
-				}
-
-				unset($params['multi_column_order']);
-			}
-
-			// Only add CSS class if columns > 1 and a local value was set for columns or order.
-			if ($nColumns > 1 && ($useLocalOrder || $useLocalCols))
-			{
-				// Convert to the according CSS class depending on order = "down" or "across".
-				$layout = ($order === 0) ? 'masonry-' : 'columns-';
-
-				if (!isset($params['blog_class']))
-				{
-					$params['blog_class'] = '';
-				}
-
-				if (strpos($params['blog_class'], $layout) === false)
-				{
-					$params['blog_class'] .= ' ' . $layout . $nColumns;
-				}
-			}
-
-			$newParams = json_encode($params);
-
-			$query = $db->getQuery(true)
-				->update($db->quoteName('#__menu'))
-				->set($db->quoteName('params') . ' = :params')
-				->where($db->quoteName('id') . ' = :id')
-				->bind(':params', $newParams, ParameterType::STRING)
-				->bind(':id', $id, ParameterType::INTEGER);
-
-			$db->setQuery($query)->execute();
-		}
-
-		// Update global parameters for com_content.
-		$nColumns = $contentParams->get('num_columns');
-
-		if ($nColumns !== null)
-		{
-			$nColumns = (int) $nColumns;
-			$order  = (int) $contentParams->get('multi_column_order', '0');
-			$params = $contentParams->toArray();
-
-			if (!isset($params['blog_class']))
-			{
-				$params['blog_class'] = '';
-			}
-
-			// Convert to the according CSS class depending on order = "down" or "across".
-			$layout = ($order === 0) ? 'masonry-' : 'columns-';
-
-			if (strpos($params['blog_class'], $layout) === false && $nColumns > 1)
-			{
-				$params['blog_class'] .= ' ' . $layout . $nColumns;
-			}
-
-			unset($params['num_columns']);
-
-			$app = Factory::getApplication();
-			/** @var ComponentModel $configModel */
-			$configModel = $app->bootComponent('com_config')
-				->getMVCFactory()
-				->createModel('Component', 'Administrator', ['ignore_request' => true]);
-
-			$query = $db->getQuery(true)
-				->select($db->quoteName('extension_id'))
-				->from($db->quoteName('#__extensions'))
-				->where($db->quoteName('element') . ' = ' . $db->quote('com_content'));
-
-			$componentId = $db->setQuery($query)->loadResult();
-
-			$data = array(
-				'id'     => $componentId,
-				'option' => 'com_content',
-				'params' => $params,
-			);
-			$configModel->save($data);
-		}
-	}
-
 	/**
 	 * Renames or removes incorrectly cased files.
 	 *