Bug 8384: Some Perl scripts do not compile

Bug 8384: Some Perl scripts do not compile

Fix syntax errors preventing the scripts misc/translator/text-extract2.pl
and misc/cronjobs/thirdparty/TalkingTech_itiva_inbound.pl from compiling.

Remove misc/migration_tools/build6xx.pl entirely since it refers to
columns that no longer exist in the Koha database, and has seemingly
had broken encoding since Koha switched from CVS to git (or before!).

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>