No underlines menu on mouseover

Theme
Stargazer -> Spring Song

Problem
When you go with your mouse over the pages in the menu it changes color and there appears a underline. The problem is that my friend doesn’t want the underline.

Code

I think there must be something changed in the child theme, here is the piece of code I think I have to change something in:

#menu-primary li a {
	font-weight: 700;
	color: #393d3e;
}

@media only screen and (max-width: 799px) {
	#menu-primary li a:hover, #menu-secondary li a:hover {
		background: #a4d7db;
		color: #ffffff;

	}
	#menu-primary li a, #menu-secondary li a {
		background: #ff80df;
		border-color: #ff80df;
	}
}

@media only screen and (min-width: 800px) {
	#menu-primary ul ul li a:hover, #menu-secondary ul ul li a:hover {
		background: #ff80df;
		color: #ffffff;
	}
	#menu-primary li li a, #menu-secondary li li a {
		background: #a4d7db;
		border-color: #a4d7db;
	}
	.menu li > ul::before {
		border-bottom-color: #a4d7db;
	}
	.ltr .menu li li > ul::before {
		border-right-color: #a4d7db;
	}
}

Thanks in advance for your help.

Friendly regard,
Jelmer