function shapeSpace_disable_image_sizes($sizes)
{
    unset($sizes['thumbnail']);  // disable thumbnail size
    unset($sizes['medium']); // disable medium size
    unset($sizes['large']); // disable large size
    unset($sizes['medium_large']); // disable medium-large size
    unset($sizes['1536x1536']); // disable 2x medium-large size
    unset($sizes['2048x2048']); // disable 2x large size

    return $sizes;
}
add_action('intermediate_image_sizes_advanced', 'shapeSpace_disable_image_sizes');

// disable scaled image size
add_filter('big_image_size_threshold', '__return_false');