Bug 31039: Remove duplicate modal printing JS

Bug 31039: Remove duplicate modal printing JS

This patch removes the erroneos duplication of the modal printing js.

Test plan
1) Create some transactions and perform a cashup.
2) Open the cashup summary modal
3) Click 'Print'
4) Cancel the print dialogue
5) Note that the dialogue re-appears
6) Apply the patch
7) Repeat and note the dialogue closes first time now.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>