Remove outdated Gratipay reference (#896)
Remove outdated Gratipay reference (#896)

Signed-off-by: Ry Jones <3af89e20f6b8fc95ceda56be26b0a3d7c39cee17@linux.com>
moyogo/pdfkit,devongovett/pdfkit,moyogo/pdfkit,devongovett/pdfkit