Disable Auto-generated Image Sizes

// Disable Auto Generated Images Sizes

add_action('intermediate_image_sizes_advanced', 'disable_image_sizes');

function disable_image_sizes($sizes) {

	//unset($sizes['thumbnail']);    

	//unset($sizes['medium']);      

	//unset($sizes['large']);        

	unset($sizes['medium_large']);

	unset($sizes['1536x1536']);    

	unset($sizes['2048x2048']);

	return $sizes;

}

add_action('init', 'disable_other_image_sizes');

function disable_other_image_sizes() {

	remove_image_size('post-thumbnail'); 

	remove_image_size('another-size');

}

add_filter('big_image_size_threshold', '__return_false');