For those that do not wish to use OneDrive and want it removed from the folder tree in Explorer, can do so by a simple registry change:

Open regedit and locate the key: HKEY_CLASSES_ROOT\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}

Change the value of System.IsPinnedToNameSpaceTree to 0

When using 64-bit, repeat the process for the key: HKEY_CLASSES_ROOT\Wow6432Node\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}

Note that starting from Windows 10 Creator, you can also remove OneDrive by uninstalling it:

• Right-click OneDrive in the start menu and click "Uninstall"
• Go to Control Panel → Add/Remove Programs and uninstall it from the list.