removed unnecessary second call to os.Exit()

code.go

import (
	"log"
	"os"
	"code.revolvingcow.com/revolvingcow/go-code/cmd"
)
func main() {
	err := cmd.NewApp().Run()
	// If there was an error report and exit
	if err != nil {
		log.Fatal(err)
		os.Exit(1)
	}
}