Do you have to remove a pregnant goldfish from the tank to have the baby fish live?

Goldfish "spawn" they do not get pregnant because they are egg layers and the eggs are fertilised after they are released from the females body. Goldfish will eat their eggs if they can find them, so either the fertilised eggs or the goldfish should be removed once 'spawning' is completed if you wish to raise some of the young. BTW 1 goldfish spawning can produce many thousands of babys.