add return function type

Author: sarron93

app/code/Magento/Catalog/Api/CategoryListDeleteBySkuInterface.php

@@ -22,5 +22,5 @@ interface CategoryListDeleteBySkuInterface
      * @throws \Magento\Framework\Exception\CouldNotSaveException
      * @throws \Magento\Framework\Exception\InputException
      */
-    public function deleteBySkus($categoryId, array $productSkuList);
+    public function deleteBySkus(int $categoryId, array $productSkuList): bool;
 }

app/code/Magento/Catalog/Model/CategoryLinkRepository.php

@@ -114,7 +114,7 @@ public function deleteByIds($categoryId, $sku)
     /**
      * {@inheritDoc}
      */
-    public function deleteBySkus($categoryId, array $productSkuList)
+    public function deleteBySkus(int $categoryId, array $productSkuList): bool
     {
         $category = $this->categoryRepository->get($categoryId);
         $products = $this->productResource->getProductsIdsBySkus($productSkuList);

app/code/Magento/Catalog/Test/Unit/Model/CategoryLinkRepositoryTest.php

@@ -207,7 +207,7 @@ public function testDelete()
 
     public function testDeleteBySkus()
     {
-        $categoryId = "42";
+        $categoryId = 42;
         $productSku = "testSku";
         $productId = 55;
         $productPositions = [55 => 1];
@@ -231,7 +231,7 @@ public function testDeleteBySkus()
      */
     public function testDeleteBySkusWithInputException()
     {
-        $categoryId = "42";
+        $categoryId = 42;
         $productSku = "testSku";
         $categoryMock = $this->createPartialMock(
             \Magento\Catalog\Model\Category::class,
@@ -248,7 +248,7 @@ public function testDeleteBySkusWithInputException()
      */
     public function testDeleteSkusIdsWithCouldNotSaveException()
     {
-        $categoryId = "42";
+        $categoryId = 42;
         $productSku = "testSku";
         $productId = 55;
         $productPositions = [55 => 1];