drop unused

cmd/pg-lo-demo/main.go

@@ -5,7 +5,6 @@ import (
 	"database/sql"
 	"flag"
 	"os"
-	"time"
 
 	"pg/src/with"
 
@@ -21,7 +20,6 @@ func main() {
 func run(ctx context.Context) error {
 	fs := flag.NewFlagSet(os.Args[0], flag.ContinueOnError)
 	c := fs.String("c", "postgresql://pulsegres:pulsegres@localhost:15432", "conn string")
-	d := fs.Duration("d", time.Second, "interval")
 	if err := fs.Parse(os.Args[1:]); err != nil {
 		panic(err)
 	}