Uninitialize git repository
git stores all the repository related data in a folder named ".git" inside your repository folder. So you just want to keep your files but change it into a "not-git-repository". Warning: this is irreversible!
cd path/to/reporm -rf .gitThe only files that might remain are hidden ".gitignore" files (but only if you added them yourself or using some tool like eclipse). To remove them:
find . -name ".gitignore" | xargs rm
Go to "File Explorer Options" in the control panel, there go to "View" and check the option that allows you to see the hidden folders.
Then go to the folder where you want to un-initialize the git repository and you will find a folder called ".git" (it will be slightly faded since it's a hidden folder).
Deleting this folder will do the trick.