Remove Any Class From WordPress Body And Post Classes - https://www.techmuzz.com/how-to/wordpress/remove-any-class-from-wordpress-body-and-post-classes/

functions.php

function remove_archive_body_class( $classes ) {
    if ( is_archive() ) {
        foreach ( $classes as $key => $value ) {
            if ( $value == 'archive' ) unset( $classes[$key] );
        }
    }
    return $classes;
}
add_filter( 'body_class', 'remove_archive_body_class', 20, 2 );

template.php

function remove_CLASS_NAME_body_class ( $wp_classes ) {
    foreach ( $wp_classes as $key => $value ) {
        if ( $value == 'CLASS_NAME' ) unset( $wp_classes[$key] );
    }
    return $wp_classes;
}
add_filter( 'body_class', 'remove_CLASS_NAME_body_class', 20, 2 );