First can you some code to work off it or some information
Second what is tt
Third to delete someone knife you can do
PHP Code:
RemovePlayerItem(client, GetPlayerWeaponSlot(client,1));
I'm not sure if the Remove function it's something from sourcemod or I created bc I can't remember and i can't check the api since I'm from the phone, and last thing I'm also not sure If slot 1 is the knife slot so you need to check it.