[Evolution] Cannot delete CalDAV calendars

["a.gnome" <a gnome icewater org>]

Hoping to get some help cleaning up my Evolution installation (3.12.11
under Fedora 21 / GNOME 3.14).


I manually modified a password in GNOME keyring, and thereafter
Evolution has been unable to open the ownCloud calendars associated with
that password.  I am informed of this every time I start Evolution:

  Error loading calendar 'Default calendar
(ownclouduser www owncloudserver tld/ownCloud)'

  Unable to connect to 'Default calendar': Cannot open calendar: Error
parsing result obtained from the keyring: 0-1:unknown keyword


I worked around this by recreating the calendars.  They now appear under
the collapsible "CalDAV" heading and appear to work, but I'm unable to
delete the old instances, which appear under a different heading in the
Evolution calendars list.  This heading is in the form:

        ownclouduser www owncloudserver tld/ownCloud

Right-clicking on these calendar accounts presents no "Delete" option.

How can I get rid of them?


Thanks!