[BUGFIX] PHP_SCRIPT_INT unnecessarily requires parameter scriptSuffix

Using PHP_SCRIPT_INT throws an Exception "Expected parameter
$conf['scriptSuffix'] was not given.", in its render() method.

As the parameter is useless and not used in other places, this check
can be removed.

Change-Id: I64fd656e0af78e711290aea597353c7194dd613d
Resolves: #25145
Releases: 4.6, 4.5
Reviewed-on: http://review.typo3.org/1466
Reviewed-by: Björn Pedersen
Reviewed-by: Susanne Moog
Tested-by: Susanne Moog
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn