Delete row ('40', '20602') from daily_volatility

ticker_id 40
day 20602
implied_open 0.5159215056575952
implied_high 0.5571952261102028
implied_low 0.5111591532976789
implied_close 0.5540203245369253
historical_open 0.43337406475238
historical_high 0.43337406475238
historical_low 0.43337406475238
historical_close 0.43337406475238
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