Is there a way to remove something from inventory without logging into a server?

[Indalor1]

I seem to have screwed something up and was hoping someone could help me out. I used NEI to cheat in a weapon. As soon as I had clicked it I was booted from the server. Now I can't get back in. When I try to log back in it says "disconnected by server, Internal server error".

I figure it has to be the item I tried to cheat into the game. Is there any was to delete it, or even everything if needed, from my inventory from outside the game?

 

[Bickers]

just delete you player.dat from the server but you will loose all the items in your inventory