Remove "Move to Dropbox" menu from Finder context menu
Solution 1:
If you go to Preferences -> Extensions -> Finder, you will see the Finder extension that you can enable/disable and you can enable/disable the Finder extension from the Dropbox app itself.
Unfortunately I don't believe you can simply remove the one option but rather it's an all-or-nothing scenario based on the extension itself. Well, at least until Dropbox makes some improvements.
Solution 2:
Type (or copy and paste) this into a Terminal shell:
/Applications/Dropbox.app/Contents/MacOS/Dropbox --move-to-dropbox=False
Solution 3:
This now can be disabled at System Preferences > Extensions > Finder Extensions.
Solution 4:
Go into Dropbox Preferences and uncheck "Finder Integration"