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

[Steffen Kamper]

Steffen Kamper schrieb:
> 
> Hi Masi,
> 
> i use the native function and never had any troubles. So maybe there 
> were some troubles in first version.
> Do you have any link of that reports so we could check it?
> 
> vg Steffen

i forgot one - IRRE is calling this function a lot. If there are any 
troubles we will see it with IRRE. So i'm for give it a try, and if 
troubles are there we are free to roll it back.

vg Steffen