Delete row ('697', '20144') from daily_volatility

ticker_id 697
day 20144
implied_open 0.1936689959699281
implied_high 0.2095435038363156
implied_low 0.1936689959699281
implied_close 0.2000187991164831
historical_open 0.1904940943966505
historical_high 0.1904940943966505
historical_low 0.1904940943966505
historical_close 0.1904940943966505
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