Delete row ('1966', '20733') from daily_volatility

ticker_id 1966
day 20733
implied_open 0.3079654526079184
implied_high 0.3174901573277509
implied_low 0.3063780018212796
implied_close 0.3095529033945571
historical_open 0.2254180117027031
historical_high 0.2254180117027031
historical_low 0.2254180117027031
historical_close 0.2254180117027031
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