MC-13824: Ensure core tests disable WYSIWYG before execution

- Don’t suggest Page Builder migration

Author: davemacaulay

app/code/Magento/PageBuilder/composer.json

@@ -17,9 +17,6 @@
         "magento/module-directory": "*",
         "php": "~7.1.3||~7.2.0"
     },
-    "suggest": {
-        "magento/module-page-builder-data-migration": "*"
-    },
     "conflict": {
         "gene/bluefoot": "*"
     },