Libra Colour Help hiding a field on Kobo Libre Colour

Hi

I wondered if anyone would be able to help me figure out how to hide the brackets containing published date on the book details page on Kobo.

At the moment it's displaying as for e.g.

Publisher: Pottermore, 2007 (7/3/07)

I would like to delete the bit in bold. Is this possible please?

Thank you.