Levy sacked Redknapp at the end of last season.
Redknapp said: "I don't spend my life holding grudges against people. It's not my style.
"What's the good? What happens happens."
Redknapp, 65, insisted he still had the hunger for management and denied he was in a no-lose situation.
"Every Saturday, if we don't win, will be a nightmare for me," he said.
"But when we do win, the highs are fantastic and I miss that."