Bug 17846: Remove C4::Koha::get_infos_of

Bug 17846: Remove C4::Koha::get_infos_of

This subroutine does not longer make any senses. The call to
get_infos_of can be replaced with $dbh->selectall_hashref.
The third argument of this subroutine was never used.

Test plan (for developer only):
Compare the 2 codes and confirm that they are equivalent

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>