No purgeCachedData()?

I’ve a question to devs - what was the reason for removing this line :

 cocos2d::CCdirector::sharedDirector()->purgeCachedData();

form function

 didreceiveMemoryWarning 

on iOS?
This function is located in AppController.mm.

I was struggling with memory management in an app that worked on previous cocos version and found out that this line was missing, causing my app to crash due to high memory usage.

Was there a reason to remove this line?

Facing Same memory issues . . . .