Delete row ('193', '20691') from daily_volatility

ticker_id 193
day 20691
implied_open 0.5317960135239828
implied_high 0.5444956198170927
implied_low 0.5143340548709564
implied_close 0.5365583658838989
historical_open 0.7857881393861835
historical_high 0.7857881393861835
historical_low 0.7857881393861835
historical_close 0.7857881393861835
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