Lead Developer
To remove the post images from the blog index, go to “Customize > Blog > Post Image” and set it to hide.
Page Headers/Featured Images are just a different style.
You can use the Disable Elements add-on to disable them on specific pages/posts.
Documentation: http://docs.generatepress.com/
Adding CSS: http://docs.generatepress.com/article/adding-css/
Ongoing Development: https://generatepress.com/ongoing-development