Keep the minimum viable info about PHP in the Book's installation chapter

Dorian Villet · weaverryan · commit d9b2cc0cb207 · 2013-11-20T16:00:11.000-08:00
diff --git a/book/installation.rst b/book/installation.rst
@@ -20,8 +20,7 @@ Installing a Symfony2 Distribution
 .. tip::
 
     First, check that you have installed and configured a Web server (such
-    as Apache) with PHP >= 5.3.3 (5.3.8 or higher being highly recommended). For
-    more information on Symfony2 requirements, see the
+    as Apache) with PHP. For more information on Symfony2 requirements, see the
     :doc:`requirements reference </reference/requirements>`.
 
 Symfony2 packages "distributions", which are fully-functional applications
