dev/core#2817 remove call to getTokenDetails
Removes the call to getTokenDetails as discussed on
https://github.com/civicrm/civicrm-core/pull/21445
As discussed on that PR & related gitlabs I
created an extension to try to allow people to have
this functionality transitionally if they needed
(based on copying code from 5.41 over) - but
per the readme https://github.com/eileenmcnaughton/legacytokenhelper/blob/master/README.md
the issues I found (under 'known issues') were enough
to make me conclude no-one would actually
want to install the extension to restore pre-5.43
functionality