diff --git a/.phpstan.baseline.neon b/.phpstan.baseline.neon
index a1204d964..380d7425d 100644
--- a/.phpstan.baseline.neon
+++ b/.phpstan.baseline.neon
@@ -640,11 +640,6 @@ parameters:
 			count: 1
 			path: app/code/core/Mage/Adminhtml/controllers/System/CurrencyController.php
 
-		-
-			message: "#^Method Mage_Adminhtml_System_StoreController\\:\\:_backupDatabase\\(\\) should return \\$this\\(Mage_Adminhtml_System_StoreController\\) but empty return statement found\\.$#"
-			count: 2
-			path: app/code/core/Mage/Adminhtml/controllers/System/StoreController.php
-
 		-
 			message: "#^Variable \\$codeBase might not be defined\\.$#"
 			count: 1
diff --git a/app/code/core/Mage/Adminhtml/Block/System/Store/Edit.php b/app/code/core/Mage/Adminhtml/Block/System/Store/Edit.php
index a2fccfd98..d8aaef1b5 100644
--- a/app/code/core/Mage/Adminhtml/Block/System/Store/Edit.php
+++ b/app/code/core/Mage/Adminhtml/Block/System/Store/Edit.php
@@ -21,28 +21,24 @@ class Mage_Adminhtml_Block_System_Store_Edit extends Mage_Adminhtml_Block_Widget
 {
     public function __construct()
     {
-        $backupAvailable =
-            Mage::getSingleton('admin/session')->isAllowed('system/tools/backup')
-            && Mage::helper('core')->isModuleEnabled('Mage_Backup')
-            && !Mage::getStoreConfigFlag('advanced/modules_disable_output/Mage_Backup');
         switch (Mage::registry('store_type')) {
             case 'website':
                 $this->_objectId = 'website_id';
                 $saveLabel   = Mage::helper('core')->__('Save Website');
                 $deleteLabel = Mage::helper('core')->__('Delete Website');
-                $deleteUrl   = $this->_getDeleteUrl(Mage::registry('store_type'), $backupAvailable);
+                $deleteUrl   = $this->_getDeleteUrl(Mage::registry('store_type'));
                 break;
             case 'group':
                 $this->_objectId = 'group_id';
                 $saveLabel   = Mage::helper('core')->__('Save Store');
                 $deleteLabel = Mage::helper('core')->__('Delete Store');
-                $deleteUrl   = $this->_getDeleteUrl(Mage::registry('store_type'), $backupAvailable);
+                $deleteUrl   = $this->_getDeleteUrl(Mage::registry('store_type'));
                 break;
             case 'store':
                 $this->_objectId = 'store_id';
                 $saveLabel   = Mage::helper('core')->__('Save Store View');
                 $deleteLabel = Mage::helper('core')->__('Delete Store View');
-                $deleteUrl   = $this->_getDeleteUrl(Mage::registry('store_type'), $backupAvailable);
+                $deleteUrl   = $this->_getDeleteUrl(Mage::registry('store_type'));
                 break;
         }
         $this->_controller = 'system_store';
diff --git a/app/code/core/Mage/Adminhtml/controllers/System/StoreController.php b/app/code/core/Mage/Adminhtml/controllers/System/StoreController.php
index 192e2d6ca..d521a2961 100644
--- a/app/code/core/Mage/Adminhtml/controllers/System/StoreController.php
+++ b/app/code/core/Mage/Adminhtml/controllers/System/StoreController.php
@@ -353,8 +353,6 @@ public function deleteWebsitePostAction()
             return ;
         }
 
-        $this->_backupDatabase('*/*/editWebsite', ['website_id' => $itemId]);
-
         try {
             $model->delete();
             $this->_getSession()->addSuccess(Mage::helper('core')->__('The website has been deleted.'));
@@ -383,8 +381,6 @@ public function deleteGroupPostAction()
             return ;
         }
 
-        $this->_backupDatabase('*/*/editGroup', ['group_id' => $itemId]);
-
         try {
             $model->delete();
             $this->_getSession()->addSuccess(Mage::helper('core')->__('The store has been deleted.'));
@@ -417,8 +413,6 @@ public function deleteStorePostAction()
             return ;
         }
 
-        $this->_backupDatabase('*/*/editStore', ['store_id' => $itemId]);
-
         try {
             $model->delete();
 
@@ -435,46 +429,6 @@ public function deleteStorePostAction()
         $this->_redirect('*/*/editStore', ['store_id' => $itemId]);
     }
 
-    /**
-     * Backup database
-     *
-     * @param string $failPath redirect path if backup failed
-     * @param array $arguments
-     * @return $this
-     */
-    protected function _backupDatabase($failPath, $arguments = [])
-    {
-        if (!class_exists('Mage_Backup_Model_Backup')
-            || !class_exists('Mage_Backup_Model_Db')
-            || !class_exists('Mage_Backup_Helper_Data')
-        ) {
-            return $this;
-        }
-
-        if (!$this->getRequest()->getParam('create_backup')) {
-            return $this;
-        }
-        try {
-            $backupDb = Mage::getModel('backup/db');
-            $backup   = Mage::getModel('backup/backup')
-                ->setTime(time())
-                ->setType('db')
-                ->setPath(Mage::getBaseDir('var') . DS . 'backups');
-
-            $backupDb->createBackup($backup);
-            $this->_getSession()->addSuccess(Mage::helper('backup')->__('Database was successfuly backed up.'));
-        } catch (Mage_Core_Exception $e) {
-            $this->_getSession()->addError($e->getMessage());
-            $this->_redirect($failPath, $arguments);
-            return ;
-        } catch (Exception $e) {
-            $this->_getSession()->addException($e, Mage::helper('backup')->__('Unable to create backup. Please, try again later.'));
-            $this->_redirect($failPath, $arguments);
-            return ;
-        }
-        return $this;
-    }
-
     /**
      * Add notification on deleting store / store view / website
      *
diff --git a/app/code/core/Mage/Core/Model/Config.php b/app/code/core/Mage/Core/Model/Config.php
index fb55df562..c8cca05e9 100644
--- a/app/code/core/Mage/Core/Model/Config.php
+++ b/app/code/core/Mage/Core/Model/Config.php
@@ -45,7 +45,6 @@ class Mage_Core_Model_Config extends Mage_Core_Model_Config_Base
         'Mage_SalesRule' => 23,
         'Mage_Usa' => 24,
         'Mage_Paygate' => 25,
-        'Mage_Backup' => 26, # removed
         'Mage_Checkout' => 27,
         'Mage_Paypal' => 28,
         'Mage_GoogleCheckout' => 29,
diff --git a/lib/MahoCLI/Commands/LegacyRenameMysql4Classes.php b/lib/MahoCLI/Commands/LegacyRenameMysql4Classes.php
index 090dcde3f..954384b10 100644
--- a/lib/MahoCLI/Commands/LegacyRenameMysql4Classes.php
+++ b/lib/MahoCLI/Commands/LegacyRenameMysql4Classes.php
@@ -54,7 +54,6 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             'Mage_Api_Model_Mysql4_Rules_Collection' => 'Mage_Api_Model_Resource_Rules_Collection',
             'Mage_Api_Model_Mysql4_User' => 'Mage_Api_Model_Resource_User',
             'Mage_Api_Model_Mysql4_User_Collection' => 'Mage_Api_Model_Resource_User_Collection',
-            'Mage_Backup_Model_Mysql4_Db' => 'Mage_Backup_Model_Resource_Db',
             'Mage_Bundle_Model_Mysql4_Bundle' => 'Mage_Bundle_Model_Resource_Bundle',
             'Mage_Bundle_Model_Mysql4_Indexer_Price' => 'Mage_Bundle_Model_Resource_Indexer_Price',
             'Mage_Bundle_Model_Mysql4_Indexer_Stock' => 'Mage_Bundle_Model_Resource_Indexer_Stock',