Bug 10455: Remove biblioitems.marc

Bug 10455: Remove biblioitems.marc

Any discussions about biblioitems.marc bring to the same conclusion:
This field is useless and should be removed.
We are storing MARC data into 2 different fields, that does not make
sense.

Test plan:
Add / update / export / import /delete records
should work as before

Signed-off-by: Mason James <mtj@kohaaloha.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>