Now you can Delete All Inactive Symbols if you are using Velocity Version - Build: 188.8.131.525
You have an option to delete all Inactive symbols in 1 click to keep your Database clean.
Open Velocity >> Go to Symbols menu >> Delete all Inactive Symbols
NOTE: All expired options / symbols automatically become Inactive & deactivated. So on the day after the Expiry (say Friday) users have to just click once 'Delete all Inactive Symbols' and all old and expired symbols will go.