MC-18552: Add api-functional test for querying for all linked categories for product

Author: danielrenaud

dev/tests/api-functional/testsuite/Magento/GraphQl/Catalog/ProductViewTest.php

@@ -997,8 +997,6 @@ public function testProductInAllAnchoredCategories()
 QUERY;
         $response = $this->graphQlQuery($query);
         $this->assertNotEmpty($response['products']['items'][0]['categories'], "Categories must not be empty");
-        /** @var ProductRepositoryInterface $productRepository */
-        $productRepository = ObjectManager::getInstance()->get(ProductRepositoryInterface::class);
         /** @var CategoryRepositoryInterface $categoryRepository */
         $categoryRepository = ObjectManager::getInstance()->get(CategoryRepositoryInterface::class);
         $categoryIds  = [3, 4, 5];