I didn't make it!
How do I make it so that you can't use sabers and melee in Multiplayer mode?
You could tweak with the botfiles so they have saber abilities set to zero, and then do the same to yourself I suppose.
Use JA+, set up a server CFG that won't allow saber or melee. Use the server CFG generator and bitvalue calculator found on the JA+ Website.
You're supposed to be able to do it with a g_weapondisable (integer here) command. Problem is there is a bug and you can't actually disable sabers. However several mods patched it, such as JA+, Red Slushie, etc...