Google Chrome includes a built-in utility called the Chrome Cleanup Tool that scans for and remove malware that injects ads or performs other unwanted behavior in Chrome. The tool does not allow the removal of Chrome extensions that are force-installed through Windows group policies. This is about to change according to a Chrome source code commit. It will, though, utilize a whitelist of Google extensions that should continue to be automatically installed in Chrome without user interaction. Users need to modify the Registry to remove the policies to remove them.
Source: https://www.bleepingcomputer.com/news/google/google-is-adding-force-installed-extension-removal-to-the-chrome-cleanup-tool/