I'd really like this feature too! I've scoured the forums & it appears CSS editing is currently required to adjust/remove the buttons in the toolbar on desktop. Someone else requested this feature ages back, but it didn't get much love from the community: [Feature Request] Toolbar move button locations? & Viewer mode - plugin button shows as gear icon - #6 by laurent
Here's hoping we can have settings in the app (rather than editing CSS) to customise the toolbar. Making customisation more user-friendly would surely be a big win for new users to Joplin & the non-technical among us.