[TYPO3-core] RFX: #9286: use native JSON-methods instead of 3rd party json script

[Dmitry Dulepov [typo3]]

Hi!

Steffen Kamper wrote:
> i found a second place in alt_shortcut and changed it in attached patch.
> 
> These 2 are the only places in core refering to 3rd party json-script.
> All others are calling t3lib_div::array2json

+1 but I think we should keep the library and mark it as "not to use". There can be some extensions that depend on its existance (like some extensions depend on prototype in the core). We can remove the library in 4.4

-- 
Dmitry Dulepov
TYPO3 Core team
My TYPO3 book: http://www.packtpub.com/typo3-extension-development/book
In the blog: http://typo3bloke.net/pages/book-reviews/presentation-zen-by-garr-reynolds/