Bug 9116: Remove some useless tmp variables

Bug 9116: Remove some useless tmp variables

Some variables are useless in C4::Items::PrepareItemrecordDisplay.

This patch removes its.

Test plan:
Syspref AcqCreateItem = "receive an order" and try to receive an order.
Check there is no regression.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>