I followed this trick to remove one drive from my PC, use the same with the slightly different way.
To remove the SharePoint pane, press the windows key and type run. Inside the run window, type regedit. Now go to HKEY_CLASSES_ROOT\CLSID\ inside regedit, right click the CLSID folder node and click 'Find' enter 'SharePoint' and do the same as they mention in the article.
Let us know if it worth to give a try.
