Delete row ('1544', '20479') from daily_volatility

ticker_id 1544
day 20479
implied_open 0.2476423227156457
implied_high 0.2571670274354782
implied_low 0.2476423227156457
implied_close 0.2492297735022844
historical_open 0.2111309546229543
historical_high 0.2111309546229543
historical_low 0.2111309546229543
historical_close 0.2111309546229543
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