Remove call to ORCID to get user names

[tkuhn]

This is done because previously introduction nanopublications didn't include a name string. Now they do. Users with old introduction nanopubs should be encouraged to update their introduction instead.

[tkuhn]

Done with 34e645643a5ca2221c361836a52591ea5e4cd7c4

Some users with old introduction nanopubs are now shown only by their ORCID identifier without their name.