Well, the question is not whether you can remove the password, but if you can disable the kwallet integration for owncloud and owncloud client.
There are a lot of issues related to kwallet:
https://github.com/owncloud/client/issu ... ue+kwalletSeems currently you need to have either kwallet or gnome-keyring:
https://github.com/owncloud/client/issues/4267 although the last comment says if none 3rd party pw management tool is available, at least the client should ask.
The other way would be to ensure that kwallet is started, because qtkeychain that is used by kwallet does not allow for dbus activation, so you need to workaround as in
https://github.com/owncloud/client/issu ... -200377228