upgrade method delete by ids to inject array skus

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

@@ -36,6 +36,19 @@ public function save(\Magento\Catalog\Api\Data\CategoryProductLinkInterface $pro
      */
     public function delete(\Magento\Catalog\Api\Data\CategoryProductLinkInterface $productLink);
 
+    /**
+     * Remove the product assignment from the category by category id and array of sku
+     *
+     * @param int $categoryId
+     * @param array $sku
+     * @return bool will returned True if products successfully deleted
+     *
+     * @throws \Magento\Framework\Exception\CouldNotSaveException
+     * @throws \Magento\Framework\Exception\StateException
+     * @throws \Magento\Framework\Exception\InputException
+     */
+    public function deleteByIds($categoryId, $sku);
+
     /**
      * Remove the product assignment from the category by category id and sku
      *
@@ -47,5 +60,5 @@ public function delete(\Magento\Catalog\Api\Data\CategoryProductLinkInterface $p
      * @throws \Magento\Framework\Exception\StateException
      * @throws \Magento\Framework\Exception\InputException
      */
-    public function deleteByIds($categoryId, $sku);
+    public function deleteById($categoryId, $sku);
 }

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

@@ -93,7 +93,7 @@ public function assignProductToCategories($productSku, array $categoryIds)
         $product = $this->getProductRepository()->get($productSku);
         $assignedCategories = $this->getProductResource()->getCategoryIds($product);
         foreach (array_diff($assignedCategories, $categoryIds) as $categoryId) {
-            $this->getCategoryLinkRepository()->deleteByIds($categoryId, $productSku);
+            $this->getCategoryLinkRepository()->deleteById($categoryId, $productSku);
         }
 
         foreach (array_diff($categoryIds, $assignedCategories) as $categoryId) {

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

@@ -21,16 +21,24 @@ class CategoryLinkRepository implements \Magento\Catalog\Api\CategoryLinkReposit
      */
     protected $productRepository;
 
+    /**
+     * @var \Magento\Catalog\Model\ResourceModel\Product
+     */
+    private $productResource;
+
     /**
      * @param \Magento\Catalog\Api\CategoryRepositoryInterface $categoryRepository
      * @param \Magento\Catalog\Api\ProductRepositoryInterface $productRepository
+     * @param \Magento\Catalog\Model\ResourceModel\Product $productResource
      */
     public function __construct(
         \Magento\Catalog\Api\CategoryRepositoryInterface $categoryRepository,
-        \Magento\Catalog\Api\ProductRepositoryInterface $productRepository
+        \Magento\Catalog\Api\ProductRepositoryInterface $productRepository,
+        \Magento\Catalog\Model\ResourceModel\Product $productResource
     ) {
         $this->categoryRepository = $categoryRepository;
         $this->productRepository = $productRepository;
+        $this->productResource = $productResource;
     }
 
     /**
@@ -64,13 +72,47 @@ public function save(\Magento\Catalog\Api\Data\CategoryProductLinkInterface $pro
      */
     public function delete(\Magento\Catalog\Api\Data\CategoryProductLinkInterface $productLink)
     {
-        return $this->deleteByIds($productLink->getCategoryId(), $productLink->getSku());
+        return $this->deleteById($productLink->getCategoryId(), $productLink->getSku());
     }
 
     /**
      * {@inheritdoc}
      */
     public function deleteByIds($categoryId, $sku)
+    {
+        $category = $this->categoryRepository->get($categoryId);
+        $products = $this->productResource->getProductsIdsBySkus($sku);
+
+        $productPositions = $category->getProductsPosition();
+
+        foreach ($products as $productSku => $productId) {
+            if (isset($productPositions[$productId])) {
+                unset($productPositions[$productId]);
+            }
+        }
+
+        $category->setPostedProducts($productPositions);
+        try {
+            $category->save();
+        } catch (\Exception $e) {
+            throw new CouldNotSaveException(
+                __(
+                    'Could not save products "%products" to category %category',
+                    [
+                        "products" => implode(',', $sku),
+                        "category" => $category->getId()
+                    ]
+                ),
+                $e
+            );
+        }
+        return true;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function deleteById($categoryId, $sku)
     {
         $category = $this->categoryRepository->get($categoryId);
         $product = $this->productRepository->get($sku);

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

@@ -113,7 +113,7 @@ public function testDeleteByIds()
         $productMock->expects($this->once())->method('getId')->willReturn($productId);
         $categoryMock->expects($this->once())->method('setPostedProducts')->with([]);
         $categoryMock->expects($this->once())->method('save');
-        $this->assertTrue($this->model->deleteByIds($categoryId, $productSku));
+        $this->assertTrue($this->model->deleteById($categoryId, $productSku));
     }
 
     /**
@@ -140,7 +140,7 @@ public function testDeleteByIdsWithCouldNotSaveException()
         $categoryMock->expects($this->once())->method('setPostedProducts')->with([]);
         $categoryMock->expects($this->once())->method('getId')->willReturn($categoryId);
         $categoryMock->expects($this->once())->method('save')->willThrowException(new \Exception());
-        $this->model->deleteByIds($categoryId, $productSku);
+        $this->model->deleteById($categoryId, $productSku);
     }
 
     /**

app/code/Magento/Catalog/etc/webapi.xml

@@ -457,7 +457,7 @@
         </resources>
     </route>
     <route url="/V1/categories/:categoryId/products/:sku" method="DELETE">
-        <service class="Magento\Catalog\Api\CategoryLinkRepositoryInterface" method="deleteByIds" />
+        <service class="Magento\Catalog\Api\CategoryLinkRepositoryInterface" method="deleteById" />
         <resources>
             <resource ref="Magento_Catalog::categories" />
         </resources>