Atahualpa - "A Sample Text Widget" which shouldn't be there

I updated my version of WP and Atahualpa yesterday. I had been terribly remiss in updates prior to this. I don't use the site too much but want to change that, hence the renewed interest.

PROBLEM: Every page now has a text box that is headed "A Sample Text Widget" and has two paragraphs of the standard latin nonsense in it. It has the same appearance as other items which appear next to it such as "Categories," "Archives" and "Recent Posts."

I have no idea how to get rid of this box.

Any help greatly appreciated.

Here is the text:

A sample text widget

Etiam pulvinar consectetur dolor sed malesuada. Ut convallis euismod dolor nec pretium. Nunc ut tristique massa.

Nam sodales mi vitae dolor ullamcorper et vulputate enim accumsan. Morbi orci magna, tincidunt vitae molestie nec, molestie at mi. Nulla nulla lorem, suscipit in posuere in, interdum non magna.
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