Bug 10527: remove disused routine C4::Branch::get_branch_code_from_name

Bug 10527: remove disused routine C4::Branch::get_branch_code_from_name

This routine is not in used and does not make sense. It should not be
used later.

Signed-off-by: Srdjan <srdjan@catalyst.net.nz>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Passes koha-qa.pl, not references to get_branch_code_from_name found.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit 7d930649065663325de95c3f8ecdbcea3bddb3b5)

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>