What was repealed seems to have been the ability to veto individual letters (creating new words). This was a laughably incomplete solution, as instead of vetoing individual letters to create whatever wording the governor liked (as it was before), he's now limited to vetoing lots and lots of words until he finds the exact wording he wanted. Hence why the example looks like lots and lots of words crossed out, instead of specific letters crossed out. The power involved is quite similar, but it's somewhat more tricky to use if you're restricted to whole words.