Initially I was messing around with the destinations creating a few for laughs & giggles. Now however, we are ready to raid, I can’t a button to delete them.

Dsyptev
Tethyis
UnknownSoldiersWoW.Com

Unless you already added all the destinations you needed you could just rename them to actually destinations you want to use.

Slightly more complicated but will ultimately delete what you don't want is to merge the destination into a real or valid one. Caution if you do this. Delete all the garbage raids and stuff associated with the test destination before merging it into the real one. Once you complete the merge it will effectively delete the original destination and just leave you will the real target.