Remove me from the buildbot mailing list

[Yujiri]

Buildbot has been spamming me with build failure emails ever since the 
documentation-only patch I submitted weeks ago. The content of the emails 
doesn't suggest any way to unsubscribe. I don't want to block sender because 
this is a project whose goals I adore and I hope to contribute more in the 
future, but I need these unsolicited irrelevant emails to stop, and it reflects 
poorly on the project that I was added to this list automatically with no 
obvious way to unsubscribe.