Describe the bug
From the feedback received from the wordpress review team.

This plugin includes folders and files that looks like are not required for the running of your plugin. Some examples are:

development tools
unneeded vendor folders for production (bower, node, grunt, etc)
demos
unit tests

If you're trying to include the human-readable version of your own code (in order to comply with our guidelines) that's fine, remember that we also permit you to put links to them in your readme.

You should also keep and/or link configuration files, as for example, the composer.json file in order to allow others to review, study, and yes, fork this code.

https://developer.wordpress.org/plugins/wordpress-org/detailed-plugin-guidelines/#4-code-must-be-mostly-human-readable

But you can, and should, safely remove those other unneeded folders from your plugins.

From your plugin:

08_18-10-54_openedx-commerce/vendor/nikic/php-parser
08_18-10-54_openedx-commerce/vendor/phar-io/manifest/.github
08_18-10-54_openedx-commerce/vendor/phpunit
08_18-10-54_openedx-commerce/vendor/myclabs/deep-copy/.github
08_18-10-54_openedx-commerce/vendor/phpunit/phpunit
08_18-10-54_openedx-commerce/vendor/phpunit/phpunit/src/TextUI/XmlConfiguration/PHPUnit