My primary website is showing up in two directories

I have a multisite installation. At a later date, I create a subirectory and installed WordPress again.

http://wordsandwriters.com (primary install)

http://wordsandwriters.com/webinars/ (sub-directory)

I think I made a mistake by installing WordPress again in the subdirectory. I then created http://webinars.wordsandwriters.com, which is what I want to run a totally separate WordPress site.

I never deleted http://wordsandwriters.com/webinars/, but just forgot about it. Then, I noticed that this site when typed in a browser goes directly to my primary install.

I don’t want to make any stupid mistakes that can adversely affect my primary multisite and its subsites (set up with the subdomain structure like site1.wordsandwriters.com). My question is: can I simply delete the wordsandwriters.com/webinars/ folder (and its WP installation) without affecting my primary multisite. Seems to me that I can.

Thanks, Joe.