Delete row ('6', '20566') from daily_volatility

ticker_id 6
day 20566
implied_open 1.573163729559006
implied_high 1.608087646865058
implied_low 1.527127656746482
implied_close 1.550939418546063
historical_open 1.336633562349831
historical_high 1.336633562349831
historical_low 1.336633562349831
historical_close 1.336633562349831
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