Remove sidebar in posts

Hello, I’m wondering if there is any way to completelly remove the sidebar in posts.

Thanks.

Hello there,

Try adding this CSS code to Appearance > Customize > Additional CSS from dashboard.

    .single-post #secondary {
      display: none;
    }

    .single-post #primary {
      float: none;
      margin-left: auto;
      margin-right: auto;
    } 

Regards,
Kharis