LinkedIn Groups might have been interesting in the past, but it seems like with each iteration LinkedIn makes the functionality less and less useful.
In order to clean up some of my activity in LinkedIn I wanted to leave some of the groups that I was a part of.
I searched on how to do this, and a lot of the results showed a LinkedIn UI from several years ago. It was not immediately clear to me how to do this.
I figured it out eventually and am documenting the process step by step with screenshots below.