Delete row ('1544', '20557') from daily_volatility

ticker_id 1544
day 20557
implied_open 0.2809787892350595
implied_high 0.2825662400216983
implied_low 0.271454084515227
implied_close 0.2746289860885045
historical_open 0.2349427164225357
historical_high 0.2349427164225357
historical_low 0.2349427164225357
historical_close 0.2349427164225357
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