Merge pull request zendframework/zendframework#2369 branch 'hotfix/remove-unused-vars'

Author: Maks3w

src/Adapter/Ldap.php

@@ -257,7 +257,7 @@ public function authenticate()
         /* Iterate through each server and try to authenticate the supplied
          * credentials against it.
          */
-        foreach ($this->options as $name => $options) {
+        foreach ($this->options as $options) {
 
             if (!is_array($options)) {
                 throw new Exception\InvalidArgumentException('Adapter options array not an array');