This change really isn't critical it was more of an FYI. If it were a larger commit or a lot more noise, I would probably be a little more firm on it. In the event you want to see how this could be done in a fairly easy way, you could try using git gui to amend the commit. For example, from a command prompt type:

    git gui

Now Click "Commit -> Amend Last Commit"

You can now select the file you want to update and then in the diff select the lines you wish to remove from the commit. Then you can use "Commit -> Revert Changes" to undo those changes.

The gui tool is easy to use, but can run into errors. This is also possible from a command line. Alternatively, you can simply make the changes (i.e. manually revert) and use

    git add .
    git commit --amend

Again, this is not critical, but I thought I would share a few ways to fix this in the event it is useful to you