As long as she is acting well other wise and the milk fluid didn't look suspicious, I would leave it...get her bred as soon as you can..her body should absorb the milk fluid.
If it were real milk then some would milk it and enjoy the "free" Milk...some goats will continue to produce full udder, how ever others once empty remain empty..its hard to say which way she would go...but with it not being real milk..I would choose to leave it...
once she kids you should have one amazing milker
Lamancha; Saanen, mini saanen and a few precious Nigies.....
Tons of chicken; turkey; ducks; hair sheep; cats ;dogs and donkeys and one horse....plus 8 human kids and one awesome hubby of 35 years