Delete row ('602', '20550') from daily_volatility

ticker_id 602
day 20550
implied_open 0.7445144189335758
implied_high 0.8334116629853461
implied_low 0.723877558707272
implied_close 0.7619763775866022
historical_open 0.7381646157870208
historical_high 0.7381646157870208
historical_low 0.7381646157870208
historical_close 0.7381646157870208
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