I have a folder called "Serverside Project" that I want to delete from my git repo online. I can't seem to be able to get rid of it! How do I remove it?

You can just delete the folder locally and then push, ex:
rm -rf folder
git add .
git commit -a -m "removed folder"
git push origin master
git rm -r folder$ git rm -r Serverside Project fatal: pathspec 'Serverside' did not match any filesgit rm -r Serverside\ Project