merged branch chx/2.0 (PR #2141)

Commits
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24b80ae Removed a leftover use.

Discussion
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Removed a leftover use.

lsmith told me to put in this request instead.

src/Symfony/Component/HttpFoundation/Request.php

@@ -11,8 +11,6 @@
 
 namespace Symfony\Component\HttpFoundation;
 
-use Symfony\Component\HttpFoundation\SessionStorage\NativeSessionStorage;
-
 /**
  * Request represents an HTTP request.
  *