Bug 36924: Remove warning "Value not allowed for auto_incr itemnumber in Item"

Bug 36924: Remove warning "Value not allowed for auto_incr itemnumber in Item"

We are removing entirely the badly written test.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Note: We cannot test this properly when the search index refers to biblios
and items that do not exist in the database.
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
(cherry picked from commit 12511385289b41c3c3d067f1b7c4397010e3d27c)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>