To install the Illegal Item Remover plugin on your Minecraft server, please follow these steps:

1. Download the plugin from a SpigotMC
2. Make sure that your server is running a compatible version of Minecraft.
3. Copy the plugin file to your server's "plugins" folder.
4. Start your server.
5. Verify that the plugin has been successfully installed by checking the server console for any error messages or by running the "/plugins" command in-game.

Once the plugin has been successfully installed, it will automatically scan players' inventories for items with illegal enchantments and remove them.