Delete row ('331', '20172') from daily_volatility

ticker_id 331
day 20172
implied_open 0.7111779524141619
implied_high 0.7191152063473557
implied_low 0.6921285429744969
implied_close 0.6953034445477744
historical_open 0.8508736216383724
historical_high 0.8508736216383724
historical_low 0.8508736216383724
historical_close 0.8508736216383724
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