Bug 12668 - Stray dollar ($) -sign in opac-reserve.pl

Bug 12668 - Stray dollar ($) -sign in opac-reserve.pl

A dollar sign is hard-coded in opac-reserve.pl and becomes apparent when trying to place a reservation
 when one has "too_much_oweing" or too much fines.

Removing the dollar sign so we just get

<"Käyttömaksujen katto ylitetty. Et voi tehdä varauksia. Sinulla on maksamattomia maksuja 9.50.">

instead of

<"Käyttömaksujen katto ylitetty. Et voi tehdä varauksia. Sinulla on maksamattomia maksuja $9.50.">

Patch removes hard coded $ sign.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
The dollar sign is gone and the message still displays correctly.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>