No. The investors should have put in the money with the expectation that some of it would be used to clear up whatever cap table issues exist. Could your ex founder pay for this himself? Sure, but founders are often short on cash and it is bad for the system if hostile VCs can come in and just bury the founders they don’t like in legal fees. I assume you’re trying to get rid of this former cofounder - 2k is a pittance, it’s better to resolve this quickly and move forward.