Non-existing visual only runways reported by the ATIS are usually a side effect of the scenery using the "Star technique" method to allow multiple crosswind runways in operation. They are a minor annoyance, but they increase the realism and traffic flow at many airports. However, since KLAX has only parallel runways, we haven't any dummy runways in the AFCAD that would create that issue.
Instead, visual only runways available in the ATC window, are usually a problem with missing Approaches, like a scenery that removes all default approaches, and fail to replace them with its own. Again, this can't possibly a problem with KLAX, since it doesn't remove the default approaches (and relies on them) and doesn't come with its own or try to redefine them.
This means, the only possible explanations for this problem are:
1) You have another AFCAD in conflict, which is causing the above issues
OR
2) You edited the AFCAD supplied with KLAX, and saved it with an editor that failed to preserve the "DeleteAllApproaches=FALSE" parameter we set in our AFCAD, which is needed to preserve the default approaches, since the scenery doesn't come with any new ones so, it didn't make much sense to add a copy of the default approaches in the AFCAD, since nothing changed there.