So I just installed Windows 10 and was instantly annoyed by the OneDrive integration. After disabling auto-start and closing the program I noticed that there is a fixed shortcut in File Explorer.
On youtube I found a video that explained to enter Registry Editor and remove these two keys:
NOTE: YOU MAY WANT TO EXPORT THE KEYS BEFORE DELETING THEM, IN CASE YOU WOULD LIKE TO USE ONEDRIVE IN THE FUTURE.
The fix is instant, but you must close all File Explorer windows before the changes take effect.