Finding Unused Mates

SW2014

While doing some trial and error design I end up with an assembly with multiple configuration as I play around getting parts to fit and work together.

I'll find that I have mates that are suppressed in every configuration.

I hate to leave unnecessary clutter in assemblies, so I was hoping there was an easy way of identifying mates that aren't used in any configuration.

Any ideas? Thanks in advance.

SolidworksAssemblies