ezific

Oh, sorry I didn’t see I was on a plugin-specific topic here. Saw the post title, posted the solution without the need for any plugins.
This plugin is probably an easier solution than mine.

Here’s the code to drop in your child theme functions.php. Tested on Divi 4.9.

// Remove Divi Generator
add_action( 'after_setup_theme', 'ezific_et_setup_theme', 11 );
function ezific_et_setup_theme(){
	remove_action( 'wp_head', 'head_addons', 7 );
	add_action( 'wp_head', 'ezific_divi_head_addons', 9 );
}
function ezific_divi_head_addons(){
	global $shortname, $default_colorscheme;

	// phpcs:disable WordPress.WP.EnqueuedResources.NonEnqueuedStylesheet
	$color_scheme = apply_filters( 'et_get_additional_color_scheme', et_get_option( $shortname.'_color_scheme' ) );
	if ( !empty( $color_scheme ) && $color_scheme !== $default_colorscheme ) { ?>
		<link rel="stylesheet" href="<?php echo esc_url( get_template_directory_uri() . '/style-' . et_get_option( $shortname.'_color_scheme' ) . '.css' ); ?>" type="text/css" media="screen" />
	<?php }

	$child_cssurl = et_get_option( $shortname.'_child_cssurl' );
	if ( et_get_option( $shortname.'_child_css' ) === 'on' && ! empty( $child_cssurl ) ) { //Enable child stylesheet  ?>
		<link rel="stylesheet" href="<?php echo esc_url( $child_cssurl ); ?>" type="text/css" media="screen" />
	<?php }

	// SECTION COMMENTED OUT - this removes the generator tag
	//prints the theme name, version in meta tag
	// $theme_info = wp_get_theme();
	// echo '<meta content="' . esc_attr( $theme_info->display( 'Name' ) . ' v.' . $theme_info->display( 'Version' ) ) . '" name="generator"/>';

	if ( et_get_option( $shortname . '_custom_colors' ) === 'on' ) et_epanel_custom_colors_css();
	// phpcs:enable
}// end function head_addons()