Delete operation is forbidden for current area in Magento 2

You can use following code for Delete operation is forbidden for current area in products or any un secured area // Here is for product delete

$registry = $objectManager->get('\Magento\Framework\Registry');
$registry->register('isSecureArea', true);
$removeproduct = $objectManager->create('\Magento\Catalog\Model\Product');
$removeproduct->load(21); / Product id
$removeproduct->delete();