minor symfony#17807 [HttpFoundation] [Session] Removed unnecessary PHP version check (Calin Mihai Pristavu)

This PR was merged into the 3.0 branch.

Discussion
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[HttpFoundation] [Session] Removed unnecessary PHP version check

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | yes
| Tests pass?   | yes
| Fixed tickets | symfony#17805
| License       | MIT

Fixes symfony#17805

Commits
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c0e41f9 [HttpFoundation] [Session] Removed unnecessary PHP version check as minimum requirement is now 5.5.9

Author: fabpot

src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php

@@ -182,12 +182,7 @@ public function setName($name)
     public function regenerate($destroy = false, $lifetime = null)
     {
         // Cannot regenerate the session ID for non-active sessions.
-        if (PHP_VERSION_ID >= 50400 && \PHP_SESSION_ACTIVE !== session_status()) {
-            return false;
-        }
-
-        // Check if session ID exists in PHP 5.3
-        if (PHP_VERSION_ID < 50400 && '' === session_id()) {
+        if (\PHP_SESSION_ACTIVE !== session_status()) {
             return false;
         }