Yes, removing them from the configuration file is preferable. In rare cases, a disabled plugin can still have an effect on the forum (there are documented cases, but I don’t have the links), and completely uninstalling it can solve issues.
Yes, removing them from the configuration file is preferable. In rare cases, a disabled plugin can still have an effect on the forum (there are documented cases, but I don’t have the links), and completely uninstalling it can solve issues.