How do I delete a FSID from RootsMagic 9?

[kbens0n]

Sounds like you may be wanting to do this:

Changing an incorrect match in FamilySearch Central

On the Share Data tab use the UnMatch button. If you are on a Mac it gets a little trickier. You will need to go through a relative’s Share Data tab to click on the FS icon on the FamilySearch side for them. It will let you remove the match that way.