Delete row ('600', '20685') from daily_volatility

ticker_id 600
day 20685
implied_open 0.7349897142137433
implied_high 0.7540391236534084
implied_low 0.730227361853827
implied_close 0.7349897142137433
historical_open 1.16042652503293
historical_high 1.16042652503293
historical_low 1.16042652503293
historical_close 1.16042652503293
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