Bug 15451: Koha::CsvProfiles - Remove the residue

Bug 15451: Koha::CsvProfiles - Remove the residue

This patch erase all traces of C4::Csv since it's not used anymore.
All occurrences have been replaced by previous patches to use
Koha::CsvProfiles.

Note that GetMarcFieldsForCsv was not used prior this patch set.

Test plan:
  git grep 'C4::Csv'
should not return any result.

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
No more traces of the file.
This produces a koha-qa fail, due to the missing file.
No other errors

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>