No need to patch drupal/coder for ignoring extension

[davereid]

This change landed in drupal/coder: https://www.drupal.org/node/3074176 that now provides the ability to override the extensions that should be scanned. We can remove the patch from https://github.com/deviantintegral/drupal_tests/blob/master/templates/module/patches.json and maybe we should update the phpcs call in https://github.com/deviantintegral/drupal_tests/blob/master/hooks/code-sniffer.sh or https://github.com/deviantintegral/drupal_tests/blob/master/templates/module/phpunit.core.xml.dist