How to Disable WordPress Page Revisions?

By default, Pages and Posts support very similar things. The full list can be found on Trac. If we want to remove one of these post type features we can use the remove_post_type_support() function:

function remove_posttype_supports() {
    remove_post_type_support( 'page', 'revisions' );
}
add_action( 'init', 'remove_posttype_supports' );

The above you would need to put in your functions.php or as a plugin.