Delete row ('2074', '20521') from daily_volatility

ticker_id 2074
day 20521
implied_open 0.265104281368672
implied_high 0.2857411415949758
implied_low 0.2270054624893419
implied_close 0.2317678148492582
historical_open 0.2031937006897606
historical_high 0.2031937006897606
historical_low 0.2031937006897606
historical_close 0.2031937006897606
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