my_dequeue_pewc_dropzone.php

<?php
/**
 * Dequeue dropzone sitewide
 */
add_action( 'wp_print_scripts', 'my_dequeue_pewc_dropzone', 100 );
add_action( 'wp_print_styles', 'my_dequeue_pewc_dropzone', 100 );
function my_dequeue_pewc_dropzone() {
	wp_dequeue_script( 'pewc-dropzone' );
	wp_deregister_script( 'pewc-dropzone' );

	wp_dequeue_style( 'pewc-dropzone' );
	wp_deregister_style( 'pewc-dropzone' );

	wp_dequeue_style( 'pewc-dropzone-basic' );
	wp_deregister_style( 'pewc-dropzone-basic' );
}