how to take out lines on the tabs/accordion of a product page

[ali219]

store url: https://7e7d4a-12.myshopify.com/
password: Qwerty123

ive gotten help to add the lines before just wanted some help to get this finishing touch

so i wanted to take out these lines first picture is in web

and second picture is in mobile

trying to get rid of the lines that im pointing at in my screenshots.

[EBOOST]

Hi @ali219 ,

May I suggest to update code these steps:

1. Go to Store Online-> theme → edit code

2. Layout/theme.liquid
3. Add code below to end of file and before tag