Remove Lines

How to remove these two lines
or how to make them taller ??
check the attached picture please

Dear 1990.
Thank you for using product our.
I'm sorry for reply late.
You coment 2 line the below:
.t3-header .top-right {
/* border-left: 1px solid #f4f4f4; */
}
and
.t3-header .top-left {
/* border-right: 1px solid #f4f4f4;*/
}
Please view this video:


Best Regards,
Huyen Tran