Delete row ('297', '20479') from daily_volatility

ticker_id 297
day 20479
implied_open 0.2127184054095931
implied_high 0.2190682085561481
implied_low 0.2079560530496768
implied_close 0.2127184054095931
historical_open 0.2206556593427869
historical_high 0.2206556593427869
historical_low 0.2206556593427869
historical_close 0.2206556593427869
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