Delete row ('331', '20147') from daily_volatility

ticker_id 331
day 20147
implied_open 0.8095999011857647
implied_high 0.8095999011857647
implied_low 0.7540391236534084
implied_close 0.7588014760133247
historical_open 1.036605363675107
historical_high 1.036605363675107
historical_low 1.036605363675107
historical_close 1.036605363675107
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