In my particular case, I doubt I really lost any points on HR screening because the skills I took off my resume were not skills that were even being asked for i

In my particular case, I doubt I really lost any points on HR screening because the skills I took off my resume were not skills that were even being asked for in the job postings I was looking at. But, you are right that I don't really know what is the impact of the change. That's probably what I've found most frustrating about job hunting and interviewing, its very hard to tell what is and isn't working.