[aur-general] Delete requests: php-zendopcache etc.

These all do the same thing, and the functionality was merged into extra/php last year: https://aur.archlinux.org/packages/php-zendopcache https://aur.archlinux.org/packages/php-zendoptimizerplus https://aur.archlinux.org/packages/zend-optimizer https://aur.archlinux.org/packages/zend-optimizer-old