Merge branch 'cs/zendframework/zendframework#6969-dead-code-removal' …

…into develop

Close zendframework/zendframework#6969

src/Storage/Adapter/Filesystem.php

@@ -915,8 +915,6 @@ protected function internalSetItem(& $normalizedKey, & $value)
      */
     protected function internalSetItems(array & $normalizedKeyValuePairs)
     {
-        $oldUmask    = null;
-
         // create an associated array of files and contents to write
         $contents = array();
         foreach ($normalizedKeyValuePairs as $key => & $value) {

src/Storage/Adapter/Memcache.php

@@ -67,7 +67,7 @@ public function __construct($options = null)
 
         // reset initialized flag on update option(s)
         $initialized = & $this->initialized;
-        $this->getEventManager()->attach('option', function ($event) use (& $initialized) {
+        $this->getEventManager()->attach('option', function () use (& $initialized) {
             $initialized = false;
         });
     }

src/Storage/Adapter/Memcached.php

@@ -79,7 +79,7 @@ public function __construct($options = null)
 
         // reset initialized flag on update option(s)
         $initialized = & $this->initialized;
-        $this->getEventManager()->attach('option', function ($event) use (& $initialized) {
+        $this->getEventManager()->attach('option', function () use (& $initialized) {
             $initialized = false;
         });
     }

src/Storage/Adapter/Redis.php

@@ -68,7 +68,7 @@ public function __construct($options = null)
 
         // reset initialized flag on update option(s)
         $initialized = & $this->initialized;
-        $this->getEventManager()->attach('option', function ($event) use (& $initialized) {
+        $this->getEventManager()->attach('option', function () use (& $initialized) {
             $initialized = false;
         });
     }