Clean Up Magento/ImportExport/Block/Adminhtml/Export/Filter

[dmanners]

Preconditions (*)

1. 2.3-develop
2. phpstan installed

Steps to reproduce (*)

1. ./vendor/bin/phpstan analyse -l 0 app/code/Magento/ImportExport/Block/Adminhtml/Export/Filter.php

Expected result (*)

1. No errors

Actual result (*)

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  Line   Filter.php
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  70     Method Magento\Backend\Block\Widget\Grid::setRowClickCallback() invoked with 1 parameter, 0 required.
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 [ERROR] Found 1 error