Okay i can understand your concern, Since i’ve limited information about code I’m still trying to provide you solution based on my understanding.
Actually what i can see in screenshot those two lines seems a top and bottom border coming from css.
You can fix it through Shopify Admin > Themes > Edit Code > Assets > Section-footer.css open this file and paste this code at the end.
.footer, .footer > div{
border: none !important
}
It should solved your problem 