woocommerce/plugins/woocommerce-admin/client/analytics/report/style.scss

.woocommerce-analytics__table-placeholder {
	.woocommerce-card__body {
		padding: 0;
	}

	.woocommerce-table__table {
		margin-bottom: 0;

		tr:last-child {
			border-bottom-style: none;
		}
	}
}