Bug 16742: (follow-up)Remove unused template subject.tt

Bug 16742: (follow-up)Remove unused template subject.tt

Delete extra useless comment line:
"# if its a subject we need to use the subject.tt"

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit a4f80ab223adc8bb3145a921153c578219e91f5d)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>
(cherry picked from commit 299f4e418df426d89d082ded792c45764d9db76a)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>