Remove leftover `return` statement.
Remove leftover `return` statement.

This leftover statement made the previous commit dead code.
Unfortunately I don't know a good way to test this. Autoload races with
target creation (thus the 2-second sleep in autoload.test) and depending
on the exact timing `lldb.target` can be `None` at script autoloading
time. The previous change helps with that situation.

sivachandra/gala,sivachandra/gala