How do I uninstall the Zotero word processor plugins?
You can uninstall the Word plugin by deleting Zotero.dotm from your Word Startup folder.
You can uninstall the LibreOffice plugin by going to Tools → “Extension Manager…”, selecting Zotero LibreOffice Integration, and clicking Remove.
The Google Docs plugin is part of the Zotero Connector. If you're no longer using Zotero, you can uninstall the Zotero Connector from your browser's Extensions pane. If you want to continue using the Zotero Connector but don't want the Zotero menu or toolbar button in Google Docs, you can disable Google Docs integration from the Advanced pane of the Zotero Connector preferences.