remove what GitHub Action auto-updater will handle

hack/update/go_github_version/update_go_github_version.go

@@ -18,7 +18,6 @@ package main
 
 import (
 	"context"
-	"fmt"
 	"os/exec"
 	"time"
 
@@ -55,12 +54,6 @@ func main() {
 
 	update.Apply(generateSchema(), data)
 
-	packageName := fmt.Sprintf("github.com/google/go-github/%s", major)
-
-	if err := exec.Command("go", "get", packageName).Run(); err != nil {
-		klog.Fatalf("failed to run go get: %v", err)
-	}
-
 	if err := exec.Command("go", "mod", "tidy").Run(); err != nil {
 		klog.Fatalf("failed to run go mod tidy: %v", err)
 	}