Android Studio keeps adding additional files to GitHub

Question

I'm using Android Studio 2.2.2, using the built in VCS tool. For some reason, Android Studio automatically adds a bunch of extra xml files and folders that I did not add nor edit.

More specifically, it's adding the following files when I don't want it to:

/_windows
IntelliLang.xml
debugger.xml
diff.xml
vcs.xml
web-browsers.xml

This makes making pull requests downright impossible as the master branch doesn't have these files, and none of my other group members seem to have this problem either.

Any help in removing / configuring Android Studio to stop this pesky bug?

--

edit: I am already using a gitignore file already. The weird thing is that my additional files are in the wrong folder too. Basically, my root folder, has a subfolder for my app. All the junk files are created in my root folder for some reason by Android Studio.

/root/
    /_windows
    IntelliLang.xml
    debugger.xml
    diff.xml
    vcs.xml
    web-browsers.xml

    /my_android_app/
                    gitignore for my app
                    /files actually needed for my project

Answer 1

Turns out this feature is called "Settings Repository", and it's intended to save IDE settings automatically. I guess I might accidentally agree on some popup from IDEA which look like add files to the git repository, so this started working.

FIX: Open Preferences → Tools → Settings Repository → Delete. I also disabled Auto-Sync. Dunno where it's going to save if I delete everything, but I switch it off to be extra safe..