How to remove sidebar in twenty fifteen theme?

Can anyone tell how to remove sidebar in twenty fifteen theme.
I don't want any sidebar in my website.
waiting for answers.

Tnx

 

Here: http://celloexpressions.com/blog/twenty-fifteen-no-sidebar/

 

This CSS should do it

body::before {
display: none;
}

Code (markup):

If you want to use the sidebar real estate and stretch the content section you can add this

.site-content {
float: none;
margin-left: none;
width: 100%;
}
.site {
max-width: 100%;
}

Code (markup):

 

job done tnx for the help