Hello bone-momma and welcome to the boards.:thumbsup:

There is really nothing sad about getting 4 females out of 6 seeds so cheer up!

It doesn't sound like you are ready to become a breeder yet....so this is a no brainer (that's why Im answering you). Yank them, yank them now so they don't create a problem later. That is if they have not already. The only thing they could do is pollinate your 4 females and you will wind up with less finished bud weight, but you would make more, lots more seeds.

Good luck and good growing.
OM