Delete the [Remove] Link

snippet.php

if(!function_exists('fc_woo_applied_coupons_in_cart_html')) {
	function fc_woo_applied_coupons_in_cart_html($coupon_html, $coupon, $discount_amount_html) {
		$discount_name = 'discount';
		//apply only for virtual coupons of woo discount rules
		if(isset($coupon->code) && strtoupper($coupon->code) == strtoupper($discount_name)) {
			$coupon_html = $discount_amount_html;
		}
		return $coupon_html;
	}
}
add_filter('woocommerce_cart_totals_coupon_html', 'fc_woo_applied_coupons_in_cart_html', 10, 3);