Bug 5327: Patch removes unneeded self=shift from TTParser::unshift_token

Bug 5327: Patch removes unneeded self=shift from TTParser::unshift_token

Removed  unneeded self=shift from unshift_token
(as peek and next do not take a self, makes interface more consistent)

http://bugs.koha-community.org/show_bug.cgi?id=5327
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
(cherry picked from commit 18bb9c22100ba810944a1341a891bc5b2e765255)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>
(cherry picked from commit eb8f99c37938bc2106843e589f3cce80602a33b8)

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>