Remove Apple specific fix for IBL
Remove Apple specific fix for IBL

This changed caused other issues
MicroWorldwide/PlayCanvas,sereepap2029/playcanvas,playcanvas/engine,sereepap2029/playcanvas,aidinabedi/playcanvas-engine,MicroWorldwide/PlayCanvas,sereepap2029/playcanvas,aidinabedi/playcanvas-engine,playcanvas/engine