[TYPO3-core] Cleanup of some PHP 5 notes

[Martin Kutschker]

Michael Stucki schrieb:
> This is a SVN patch request.
> 
> Problem:
> No problems, but this has just become effective:
> - http://www.gophp5.org/
> - http://buzz.typo3.org/people/stucki/article/leaving-php4-behind/
> 
> Solution:
> Remove some < PHP 5.1 specific notes from various files.

You remived the note in t3lib_div concerning the xml parsing, but didn't 
change the code which might be simplified for 5.1+.

Masi