FD_ItemCleaner is a plugin that allows the operators ban items and clean it.
It's super fast, only 1ms for checking 20 players

Commands:
/addtoblacklist (/atbl)
/removefromblacklist (/rfbl)
/printblacklist (/pbl)
Bugs:
The plugin will ban emeralds if you add a common bedrock in the blacklist
The plugin will clean the entire armor slot when detected a banned item in the armor slot