Remove communication of coordinates in DS sum #74
Description
Here just to keep it in mind.
With the current way of doing things, we do not need to have the full coordinates of the vertices, edges or faces ever. Right now the communication of those is still done as a left over from a previous implementation.
This of course increases memory overhead and some extra communication time and more messages that can be lost.
Leave it for the moment since dssum is too new and there might be bugs that might need coordinates.
If nothing is found for a while, then simply remove them. It would make everything faster and lighter.