all: migrate go-bindata to embed (ethereum#24744)

cmd/faucet/faucet.go

@@ -17,12 +17,10 @@
 // faucet is a Ether faucet backed by a light client.
 package main
 
-//go:generate go run github.com/kevinburke/go-bindata/go-bindata -nometadata -o website.go faucet.html
-//go:generate gofmt -w -s website.go
-
 import (
 	"bytes"
 	"context"
+	_ "embed"
 	"encoding/json"
 	"errors"
 	"flag"
@@ -91,6 +89,9 @@ var (
 	ether = new(big.Int).Exp(big.NewInt(10), big.NewInt(18), nil)
 )
 
+//go:embed faucet.html
+var websiteTmpl string
+
 func main() {
 	// Parse the flags and set up the logger to print everything requested
 	flag.Parse()
@@ -122,13 +123,8 @@ func main() {
 			periods[i] = strings.TrimSuffix(periods[i], "s")
 		}
 	}
-	// Load up and render the faucet website
-	tmpl, err := Asset("faucet.html")
-	if err != nil {
-		log.Crit("Failed to load the faucet template", "err", err)
-	}
 	website := new(bytes.Buffer)
-	err = template.Must(template.New("").Parse(string(tmpl))).Execute(website, map[string]interface{}{
+	err := template.Must(template.New("").Parse(websiteTmpl)).Execute(website, map[string]interface{}{
 		"Network":   *netnameFlag,
 		"Amounts":   amounts,
 		"Periods":   periods,