Removed NoZebra vestiges. This comprises several code blocks that depend on the NoZebra syspref and NZ related functions/methods.
C4::Biblio->
GetNoZebraIndexes
_DelBiblioNoZebra
_AddBiblioNoZebra
C4::Search->
NZgetRecords
NZanalyse
NZoperatorAND
NZoperatorOR
NZoperatorNOT
NZorder
C4::Installer->
set_indexing_engine
Sponsored-by: Universidad Nacional de Córdoba
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>