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

[Steffen Kamper]

Benjamin Mack schrieb:
> btw: that's the nice thing about the t3lib_div wrapper: Everybody should 
> use this function anyway, so we people don't need to change their 
> scripts. I remember using JSON through the t3lib_div class but not by 
> instantiating the class by myself, so we "should" be good to go.
> 
hey Benni,

you see even core didn't used this rule as alt_shorcut makes a native 
include

vg Steffen