How to remove strokes before menu items in joomla?

Question

Joomla

I have joomla! 3.6.2. They gave the site for revision. In one of the paragraphs of the TK it says - "Remove strokes in the menu." I did not install them and there is no way to communicate with a programmer who previously worked with this site. In the section where the menu is located - there are no strokes. Googled nothing on this subject.

Can you please tell me where to look for clues?

Answer 1

I suspect that they are made using ::pseudo-element.
But guessing broke, give a link, we'll see.
UPD: Delete)

.navbar-nav > li > a::before, .navbar-nav > li > span::before {
    content: "";
    border-bottom: 1px solid #d9d9d9;
    width: 15px;
    display: inline-block;
    margin-right: 5px;
}