Sure, you can remove it. It was just a temporary mount point to use in mounting the new partition so that you could move the files into it. The new partition is now mounted via fstab. I suppose it would have helped if I had given a few comments in re the reasons for the commands along with the commands themselves.
If future, when you have a Linux/Unix related question, try www.google.com/linux
first. It's a google search filter that filters 99.9% of unrelated hits. There are similar filters for microsoft and macos systems. You may find your answer sooner that you would by waiting for an answer here.
If you still can't resolve a problem, then post it here.
Good Luck and enjoy Linux.