Hi Rory,
As long as it does not go again the TOS, you use any of the following solutions:
1) Add a style to hide the credits div:
#credits {display: none;}
2) Use Regular Labs (formerly NoNumber) ReReplacer to change the text/link to your desired output
www.regularlabs.com/extensions/rereplacer
3) Perform a Language Override
www.youtube.com/watch?v=0KiE-CtbZyY
I hope this helps,
Joe Campbell