[cleanup] completely remove stats.sum_inplace
Created by: PhilipVinc
Removing some old code. This is the end of what was started in some older PR of removing sum_inplace.
It was still used only in a bunch of places so this is relatively small.
Created by: PhilipVinc
Removing some old code. This is the end of what was started in some older PR of removing sum_inplace.
It was still used only in a bunch of places so this is relatively small.