Fix up lint and don't make temporary variables.

src/Http/Cookie/CookieCollection.php

@@ -98,8 +98,7 @@ class CookieCollection implements IteratorAggregate, Countable
      */
     public function has($name)
     {
-        $key = mb_strtolower($name);
-        return isset($this->cookies[$key]);
+        return isset($this->cookies[mb_strtolower($name)]);
     }
 
     /**
@@ -112,8 +111,7 @@ class CookieCollection implements IteratorAggregate, Countable
      */
     public function remove($name)
     {
-        $key = mb_strtolower($name);
-        unset($this->cookies[$key]);
+        unset($this->cookies[mb_strtolower($name)]);
 
         return $this;
     }

tests/TestCase/Http/Cookie/CookieCollectionTest.php

@@ -91,7 +91,6 @@ class CookieCollectionTest extends TestCase
         $rememberNo = new Cookie('remember_me', 'no');
         $this->assertSame($collection, $collection->add($remember)->add($rememberNo));
         $this->assertSame($rememberNo, $collection->get('remember_me'));
-
     }
 
     /**