Removed Sharkf00d and Itls-Ensô, is there any risk?

I just installed VitaDB Downloader, and some plugin and Sharkf00d were installed. I didn't find what I wanted on VitaDB downloader, so after some quick researches I deleted Sharkf00d (and Itls-Ensô because it's only useful at the first install?).

I'm an anxious person and I like to delete (and know I can safely delete) something when it's useless, I know it wouldn't take that much space but if it is deletable, I would.

But I also trust people more aknowledged than me, so : Did I do something wrong? Won't the plugin take too much space or prevent me to do something in the future? If I uninstall VitaDB Downloader, will everything be ok, even if I install it again some day?

Thanks for your advices