PHP ini setting register_globals has been removed with
PHP version 5.4. This setting is now more than obsolete,
the last mention in Install.md and the check in system
environment check can be dropped.

Change-Id: I8f9f6b55a12aec756450c6316295b278c20e9fc9
Resolves: #77422
Releases: master
Reviewed-on: https://review.typo3.org/49404


Tested-by: Bamboo TYPO3com <info@typo3.com>
Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Reviewed-by: Tobias Adolph <mail@tobiasadolph.de>
Tested-by: Tobias Adolph <mail@tobiasadolph.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>