Disable Nautilus Nextcloud integration

Edit the file:

usr/share/applications/com.nextcloud.desktopclient.nextcloud.desktop

Comment the following lines:

#Implements=org.freedesktop.CloudProviders

#[org.freedesktop.CloudProviders]
#BusName=com.nextcloudgmbh.Nextcloud
#ObjectPath=/com/nextcloudgmbh/Nextcloud