niletech: delete backups from the 2026-10-13/14 changes

Imported from GitHub issue El-SaMa/oma#196 by @El-SaMa.

On the niletech host after about 2026-10-20, once the price, phone and English storefront changes have proven fine:

• ~/backups/pre-price-phone-20261013.sql (266 MB)
• ~/backups/lafu-polylang-woocommerce-fallback.php.20261014
• ~/backups/rewrite_rules.before-20261014.json