Umbraco 9+ appsettings.json configuration to remove init HTML P tags in TinyMCE RTE

appsettings.json

{
  "$schema": "./umbraco/config/appsettings-schema.json",
  "Umbraco": {
    // NOTE: Other settings removed in this example for clarity
    "CMS": {
      "RichTextEditor": {
        "CustomConfig": {
          "forced_root_block": ""
        }
      }
    }
  }
}