1000's of expression maps

I have a very large template where most of the tracks have an expression map. To scale back the amount of tracks in my template I have made multi-track presets of things like “big perc hits”, “strings”, etc…

If I remove the string tracks the expression maps remain in the expression map list. If I add the strings back it now brings a new expression map into that list for each track I just brought in. After several months of adding and deleting these tracks I have probably 10,000 expression maps.

Is there a way to REMOVE unused expression maps with a command. I can not see me deleting one at a time manually. There needs to be a command to remove unused expression maps as well as Cubase needs to remove the expression maps automatically if the tracks that use them are deleted.