WP - bulk remove category

bulk_category_remover.php

<?php
add_action( 'init', function()
{
    // Get all the posts which is assigned to the uncategorized category
    $args = array(
    	'post_type' => 'cp_crq_news',
        'posts_per_page' => -1, // Adjust as needed
        'cat'            => 84, // Category ID for uncategorized category
        'fields'         => 'ids', // Only get post ID's for performance
        // Add any additional args here, see WP_Query
    );
    $q = get_posts( $args );

    // Make sure we have posts
    if ( !$q )
        return;

    // We have posts, lets loop through them and remove the category
    foreach ( $q as $id )
        wp_remove_object_terms(
            $id, // Post ID
            84, // Term ID to remove
            'category' // The taxonomy the term belongs to
        );
}, PHP_INT_MAX );