updated composer files to current pantheon composer drops example

Author: kclarkson

composer.json

@@ -40,7 +40,6 @@
         "drupal/recaptcha": "^2.3",
         "drupal/redirect": "^1.3",
         "drupal/quicklink": "^1.0",
-        "drupal/simple_block": "^1.0@beta",
         "drupal/seo_checklist": "^4.1",
         "drupal/simple_sitemap": "^2.12",
         "drupal/subpathauto": "^1.0@beta",