Remove Image Sizes

function eusb_remove_image_sizes( $sizes ) {
    foreach ( $sizes as $key => $name ) {
        if ( in_array( $name, array( 'medium_large', '1536x1536', '2048x2048' ), true ) ) {
            unset( $sizes[ $key ] );
        }
    }

    // Return as consecutive array.
    return array_values( $sizes ;
}
add_action( 'intermediate_image_sizes', 'eusb_remove_image_sizes', 999 );