Revert "[1/2] Camera: add software HDR rendering"

After investigating the code deeper it is still just a mem wasting feature which is even in asynchrontask and clear up memory just a crap...especially when you look at the result. Due to our Slim politics

reverted

This reverts commit ae6e0ce951b18d34681b477fdcc587b47bee3ecd

Change-Id: Ic10a6f0c0dffbadf8b49eab6588c8450521fc46c