Fixing golangci-lint error: rand.Seed has been deprecated since Go 1.20

Signed-off-by: rohitagg2020 <[email protected]>

Author: rohitagg2020

cmd/vendir/vendir.go

@@ -6,18 +6,14 @@ package main
 import (
 	"io"
 	"log"
-	"math/rand"
 	"os"
-	"time"
 
 	uierrs "github.com/cppforlife/go-cli-ui/errors"
 	"github.com/cppforlife/go-cli-ui/ui"
 	"github.com/vmware-tanzu/carvel-vendir/pkg/vendir/cmd"
 )
 
 func main() {
-	rand.Seed(time.Now().UTC().UnixNano())
-
 	log.SetOutput(io.Discard)
 
 	// TODO logs