The wording is complicated because they need to amend it in multiple spots to accomplish the goal.

/u/Selfless- 's link is also a good one.

But for a simple explanation:

The Register of Probate for your county no longer has any responsibilities or functions. This eliminates it as an elected position and gets rid of the multiple references to it in the state constitution.

It's getting rid of an archaic office that again, no longer does anything.

You currently get asked to elect someone to a completely pointless office. After this, you wouldn't.

There's basically no reason for anyone to vote against it unless you've got some strong opinions against the court/probate reforms from over a decade ago and want functions to go back to that office.....I don't know of anyone who actually holds an opinion about that.