Ok, i think i’ve found a solution… sort of. I could always do #secondary { display: none } of course, but then the sidebar would still be rendered and i didn’t want that. So that’s what i did instead:
First i deleted everything from sidebar.php.
Then i added two declarations to my child-theme’s main css:
.container {
max-width: 750px;
}
.col-md-8 {
width: 100%;
}
It seems to be working now (still have to do some testing). But lmk if there’s a more appropriate solution.