Remove redundant setting of cli.HelpFlag

The help flag is configured automatically by default already. We don't
need to redo that for every single service.

This also addresses one of the finding of "go race" (#4088)

services/auth-basic/pkg/command/root.go

@@ -33,11 +33,6 @@ func Execute(cfg *config.Config) error {
 		Commands: GetCommands(cfg),
 	})
 
-	cli.HelpFlag = &cli.BoolFlag{
-		Name:  "help,h",
-		Usage: "Show the help",
-	}
-
 	return app.Run(os.Args)
 }