How I can hide unneeded slides in a CMS slider?


Hello guys. Right now I am creating a portfolio site and I used a slider to present certain information in each case study within the portfolio. Every slide I created won’t apply for every case study within the portfolio but every slide is necessary to have available so I was wondering how I can hide certain slides that don’t apply for a particular case study. It looks like the hide button is disabled for slides on the page.

Here is my public share link: LINK
(how to access public share link)

Update: I’ve learned about conditional visibility which is PERFECT except it creates any empty slide at the end. Anyone know how to get rid of the empty slide?