Delete Operation Forbidden for Current Area in Magento 2

Agree with Max that you should use the ProductRepositoryInterface::deleteById($sku), but you'll also need to make an additional change to get permissions to delete.

Note that the Admin area handles this by creating the following config in app/code/Magento/Backend/etc/adminhtml/di.xml

    <preference for="Magento\Framework\Model\ActionValidator\RemoveAction" type="Magento\Framework\Model\ActionValidator\RemoveAction\Allowed" />

The Magento\Framework\Model\ActionValidator\RemoveAction\Allowed class prevents a permission check by simply returning true in the isAllowed method.

Without the above change to di.xml the Magento\Framework\Model\ActionValidator\RemoveAction class will be used, which will cause your delete request to fail unless $this->registry->registry('isSecureArea') is set to true.

It looks like you are trying to create some console commands and I'm not very familiar with them yet, so your best bet for now may be to set the registry to allow the delete operation and refactor later if a cleaner solution is found.

$this->registry->register('isSecureArea', true)

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();

Its working for me