MAGETWO-89238: [Sales email] Disabled invoice emails produce performance issue

Author: RuslanKostiv1

app/code/Magento/Backend/Controller/Adminhtml/System/Store/Save.php

@@ -46,7 +46,7 @@ private function processWebsiteSave($postData)
      */
     private function processStoreSave($postData)
     {
-        $eventName = 'store_edit';
+        //$eventName = 'store_edit';
         /** @var \Magento\Store\Model\Store $storeModel */
         $storeModel = $this->_objectManager->create(\Magento\Store\Model\Store::class);
         $postData['store']['name'] = $this->filterManager->removeTags($postData['store']['name']);
@@ -56,7 +56,7 @@ private function processStoreSave($postData)
         $storeModel->setData($postData['store']);
         if ($postData['store']['store_id'] == '') {
             $storeModel->setId(null);
-            $eventName = 'store_add';
+            //$eventName = 'store_add';
         }
         $groupModel = $this->_objectManager->create(
             \Magento\Store\Model\Group::class

app/code/Magento/Sales/Model/EmailSenderHandler.php

@@ -60,7 +60,6 @@ class EmailSenderHandler
      * @param \Magento\Framework\App\Config\ScopeConfigInterface $globalConfig
      * @param IdentityInterface|null $identityContainer
      * @param \Magento\Store\Model\StoreManagerInterface $storeManager
-     * @throws \InvalidArgumentException
      */
     public function __construct(
         \Magento\Sales\Model\Order\Email\Sender $emailSender,

app/code/Magento/Store/Test/Unit/Model/Config/Importer/Processor/DeleteTest.php

@@ -244,8 +244,6 @@ public function testRun()
             ->method('get')
             ->with('test')
             ->willReturn($this->storeMock);
-        $this->storeResourceMock->expects($this->once())
-            ->method('addCommitCallback');
 
         $this->registryMock->expects($this->once())
             ->method('unregister')

app/code/Magento/Store/Test/Unit/Model/Config/Importer/Processor/UpdateTest.php

@@ -247,8 +247,6 @@ public function testRun()
         $this->storeResourceMock->expects($this->once())
             ->method('save')
             ->with($this->storeMock);
-        $this->storeResourceMock->expects($this->once())
-            ->method('addCommitCallback');
 
         $this->model->run($data);
     }

dev/tests/integration/testsuite/Magento/Sales/Model/InvoiceEmailSenderHandlerTest.php

@@ -55,7 +55,7 @@ protected function setUp()
 
     /**
      * @magentoAppIsolation  enabled
-     * @magentoDbIsolation   enabled
+     * @magentoDbIsolation   disabled
      * @magentoDataFixture   Magento/Sales/_files/invoice_list_different_stores.php
      */
     public function testInvoiceEmailSenderExecute()

dev/tests/integration/testsuite/Magento/Store/_files/second_store.php

@@ -30,8 +30,3 @@
     );
     $store->save();
 }
-
-/* Refresh stores memory cache */
-//\Magento\TestFramework\Helper\Bootstrap::getObjectManager()->get(
-//    \Magento\Store\Model\StoreManagerInterface::class
-//)->reinitStores();