We use our custom arrows. If you want to get rid of it, go to edit skin in essential grid and simply remove or comment this code
/* jaw custom arrows */
#jaw-custom-arrow-for-es-grid .esg-navigationbutton.esg-right.esg-fgc-2,
#jaw-custom-arrow-for-es-grid .esg-navigationbutton.esg-left.esg-fgc-2{
width: 25px;
height: 45px;
padding: 6px 0;
line-height: 33px;
text-align: center;
cursor: pointer;
top: 50%;
transform: translateY(-50%);
z-index: 9;
border-radius: 0;
}