Mailspring/packages/client-app/dot-nylas/config.json

{
  "*": {
    "env": "production",
    "core": {
      "themes": [
        "ui-light"
      ],
      "disabledPackages": [
        "message-view-on-github",
        "personal-level-indicators",
        "phishing-detection",
        "nylas-private-salesforce",
        "github-contact-card",
        "keybase",
        "thread-snooze",
        "send-later",
        "send-reminders",
        "thread-sharing",
        "composer-markdown",
        "composer-scheduler",
        "composer-mail-merge",
        "send-and-archive",
        "main-calendar"
      ]
    }
  }
}