examples: uncomment custom search example

This was previously blocking a build. This commit just uncommented
the code.

Fixes: #469
Change-Id: I9a39a5b227be5e28b17a5ebc8f40a436796304e3
Reviewed-on: https://code-review.googlesource.com/c/google-api-go-client/+/55190
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Tyler Bui-Palsulich <tbp@google.com>
diff --git a/examples/customsearch.go b/examples/customsearch.go
index 2f1609a..8199dfd 100644
--- a/examples/customsearch.go
+++ b/examples/customsearch.go
@@ -4,28 +4,36 @@
 
 package main
 
-// TODO(codyoss): uncomment after next generation and fix
-// const (
-// 	apiKey = "some-api-key"
-// 	cx     = "some-custom-search-engine-id"
-// 	query  = "some-custom-query"
-// )
-//
-// func customSearchMain() {
-// 	client := &http.Client{Transport: &transport.APIKey{Key: apiKey}}
-//
-// 	svc, err := customsearch.New(client)
-// 	if err != nil {
-// 		log.Fatal(err)
-// 	}
-//
-// 	resp, err := svc.Cse.List().Q(query).Cx(cx).Do()
-// 	if err != nil {
-// 		log.Fatal(err)
-// 	}
-//
-// 	for i, result := range resp.Items {
-// 		fmt.Printf("#%d: %s\n", i+1, result.Title)
-// 		fmt.Printf("\t%s\n", result.Snippet)
-// 	}
-// }
+import (
+	"fmt"
+	"log"
+	"net/http"
+
+	"google.golang.org/api/customsearch/v1"
+	"google.golang.org/api/googleapi/transport"
+)
+
+const (
+	apiKey = "some-api-key"
+	cx     = "some-custom-search-engine-id"
+	query  = "some-custom-query"
+)
+
+func customSearchMain() {
+	client := &http.Client{Transport: &transport.APIKey{Key: apiKey}}
+
+	svc, err := customsearch.New(client)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	resp, err := svc.Cse.List().Q(query).Cx(cx).Do()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	for i, result := range resp.Items {
+		fmt.Printf("#%d: %s\n", i+1, result.Title)
+		fmt.Printf("\t%s\n", result.Snippet)
+	}
+}