I don't think decoder-null-magetrend-email-0.0.3 in the compressed package can completely remove the callback, so handmade to remove default package callback
Added: Magetrend Review extension follow up template to awesome template collection
Added: email_customer_note variable in preview variable list
Fixed: Deprecated Errors in files: Mteditor.php on line 114, Html2Text.php on line 321
Fixed: Magento\Test\Integrity\ObserverImplementationTest::testObserverHasNoExtraPublicMethods 1 of observers have extra public methods: Magetrend\Email\Observer\Config