Woocommerce Column Checkout

Hello,

When using WooCommerce its changing the width of the columns on the checkout page and I’m not sure why. Its adding this code in my header and I can’t figure out where its coming from. The code is:

<style type=”text/css” media=”screen”>
.woocommerce #customer_details .col-1,.woocommerce #customer_details .col-2{
width: 98%;
}
.cart-collaterals .cross-sells{
display: none;
}

@media (max-width:640px) {
.woocommerce #customer_details .col-1,.woocommerce #customer_details .col-2{
width: 100% !important;
}
}
</style>

Thanks