How can i remove award weapons ?

remove or comment out the lines in the common non-award pistol odf?
I'm not sure, but that'd be my my guess.

do you mean just make it so a clone trooper for instance can't get the award rifle and pistol?

that is pretty easy...there are 5 weapon sections in the ODF, the last 2 are for award weapons, remove them

No, that will mess up the game when you win the award. Follow Caleb's advice.

No, no. Close, but no cigar on both counts. You should take the non-award weapon odf, and do this:
That keeps the non-award weapon from being locked out when you achieve the award. However, that's not all. You also need to go into the award weapon odf and do the same so you can't unlock the award weapon, or you'll have both weapons. It should look like this:
Then, you can remove the award weapons from the unit's odf without screwing up the game.

It'll say you have the award if you've already earned it via career stats (the yellow text when you first spawn on a map), but you won't be able to access it, and it shouldn't count anything towards the award when using the weapon. At least, that's how it worked when I last checked my own weapons.

In short:

1) disable the non-award weapon lockout
2) disable the award weapon unlock
3) remove award weapon from unit