Bug 35949: Remove useless code pointing to branchreserves.pl in request.tt

Bug 35949: Remove useless code pointing to branchreserves.pl in request.tt

messagetransfert is never set (it is from circ/waitingreserves.pl, `git grep messagetransfert`) and branchreserves.pl does not exist!

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit 4b6508e7ea24dd188090ebc1e6e3dba820ece645)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit a2bfc13866a6d1b3b9c877682d594af4157b3bbf)
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>