ZF-9014: remove useless code from Zend_Cache_Backend::_loggerSanity()

Description

There are a few useless lines of code in Zend_Cache_Backend::_loggerSanity() since ZF-3875.

try {
    /**
     * @see Zend_Log
     */
    require_once 'Zend/Log.php';
} catch (Zend_Exception $e) {
    Zend_Cache::throwException('Logging feature is enabled but the Zend_Log class is not available', $e);
}

Comments

Attached patch.

Fixed in trunk and 1.10 release branch.