Do those still persists after you pressed the 'Clear' button in the console window or after restarting Unity?
Usually those types of warnings are only messages/notifications that are there to inform the end user.
If they don't stay there and you don't need these variables anyway, you should be good to go.
If they do, you might want to copy one of those errors or make a screenshot of them and post them here.
It could be that the missing variables are still referenced in some actions inside the FSM they were previously in, though it should also show related errors in the Error Check window (in the PlayMaker Editor at the bottom left). Then you would have to go through them and change the linked variables.