Remove "Blog" word on blog posts


I'm making a corporate website and the client would like to hide all references to "Blog". I noticed that on all blog entries, the word "Blog" is printed at the top of the page, before the post title.

I can delete the word in UpFront but that I'd have to do it on each post. Where in the template should I go to remove it from all future posts? Also how to edit the default size of the title under the word "Blog"?