Fix static test failures for class annotaions

[ihor-sviziev]

Description (*)

I found that we have false positive static tests, example:
8ea9b0e

PHP Code Sniffer detected 2 violation(s): 
FILE: /var/www/html/app/code/Magento/Sales/Cron/CleanExpiredQuotes.php
----------------------------------------------------------------------
FOUND 1 ERROR AFFECTING 1 LINE
----------------------------------------------------------------------
 12 | ERROR | [x] Class is missing annotation block
----------------------------------------------------------------------
PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
----------------------------------------------------------------------
Failed asserting that 2 matches expected 0.

These checks were moved to Magento Coding Standards, so we don't need to have them.
In addition to that - removed class annotation is ok - magento/magento-coding-standard#171

CC @lenaorobei

Related Pull Requests

Fixed Issues (if relevant)

1. magento/magento2#<issue_number>: Issue title

Manual testing scenarios (*)

1. ...
2. ...

Questions or comments

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 are green)

[m2-assistant]

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

Hi @lenaorobei, thank you for the review.
ENGCOM-7097 has been created to process this Pull Request

[magento-engcom-team]

Hi @dmytro-ch, thank you for the review.
ENGCOM-7097 has been created to process this Pull Request

[engcom-Delta]

Notice: QA not applicable

[engcom-Charlie]

Failed functional tests not related to the changes in this PR

[m2-assistant]

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