remove resetCouponAfterCancellation because it's handled by CouponUsagesDecrement plugin

[sanderjongsma]

I did not test it, but came across it, so this should be handled by magento in this plugin:

vendor/magento/module-sales-rule/etc/di.xml

<type name="Magento\Sales\Model\Service\OrderService">
        <plugin name="coupon_uses_decrement_plugin" type="Magento\SalesRule\Plugin\CouponUsagesDecrement" />
    </type>

It's probably not a big deal, but it can affect the coupon_usages number if it is applied twice.

Actually, the plugin has been in Magento for quite a while. I checked the merge request that added this functionality in Mollie, and it was from 2018. Magento later fixed it: GitHub Issue #12817. That's probably why it's still in the code.