Ugly black Google+ bar on website

Today I noticed a black Google+ bar that pops up when I scroll down on my dashboard. How do we get rid of it? It’s ugly & obtrusive, and I don’t use Google+.

My mistake; it includes Twitter & Facebook as well. The “ugly & obtrusive” part is still accurate. :smile:

E-mail about this - they are usually quit quick to reply and should be able to sort things out.