Bug 36088: Remove useless code form opac-account-pay.pl

Bug 36088: Remove useless code form opac-account-pay.pl

The script opac-account-pay.pl sums the selected accountlines, formats the amount, pulls the currently active currency, and does nothing with any of this data.

Test Plan:
1) Apply this patch
2) Restart all the things!
3) Note there is no change in behavior

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Pedro Amorim <pedro.amorim@ptfs-europe.com>
PA amended title (missing 'Bug ####:'

Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
(cherry picked from commit dd7ac62d3f184b7c76296389a16192a45fdadae0)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit ebf8d687cc78da22c6bbb5b2bdf49845e3c2f089)
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>