In Google Slides, how to remove a text block from all slides at once?

Question

I have a slide deck that has a "footer" element on every single slide, rather than just on the Master slide. I've fixed this by using the Master slide, but now I have to remove this footer element from nearly 200 slides.

Is there any way to remove this repeated block from every slide at once? Find/Replace doesn't work as I end up with "Unsupported Placeholder" on every page instead.

Answer 1

Seems this is not possible. I ended up just manually going through every single slide and deleting the block in question. Tedious but at least it's done.