Remove unnecessary class import, see #18280

[sreichel]

Description (*)

In magento2/#18280 this was added to sort the collection ...

use Magento\Framework\Data\Collection;`
...
->setDirection(Collection::SORT_ORDER_ASC)

Instead we can use setAscendingDirection(). If not Magento\Framework\Api\SortOrder::SORT_ASC would be more correct. (?)

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-engcom-team]

Hi @sreichel. Thank you for your contribution
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[magento-engcom-team]

Hi @orlangur, thank you for the review.
ENGCOM-3211 has been created to process this Pull Request

[magento-engcom-team]

Hi @sreichel. Thank you for your contribution.
We will aim to release these changes as part of 2.2.8.
Please check the release notes for final confirmation.

Please, consider to port this solution to 2.3 release line.
You may use Porting tool to port commits automatically.