Editing POST look

Hello

Is there and option I can delete ,,Zakładka permalink” which shows below the questions? I also would like to delete right side bar.

I already put that code in CSS and it partially worked becouse I got rid of date:

.entry-author-link,
.entry-permalink,
.entry-date,
.entry-meta {
display: none;
}

What I would like to do is to move the test ,made by Wp-testing, to normal page to so it would be fullwidth but It can not be done so I have to change the look of POST page.

Thanks in advance

The page I need help with: [log in to see the link]