Deleting 1000's of Expression maps...

I use multi-track presets and bring in and out many tracks that contain Expression Maps. After doing this many many times the expression maps NEVER get deleted and I have many 1000’s of them in my Expression Map list.

Cubase needs to automatically or at least have a function to remove these UNUSED expression maps. My file and save times are forever now and I need to delete these UNUSED maps.

IS there a way to delete more than 1 at a time? This would be waaaaaaaaaaaay too painful to do one at a time.