Delete row ('600', '20560') from daily_volatility

ticker_id 600
day 20560
implied_open 0.9794571353561115
implied_high 0.9794571353561115
implied_low 0.9381834149035039
implied_close 0.9413583164767814
historical_open 0.911196751530645
historical_high 0.911196751530645
historical_low 0.911196751530645
historical_close 0.911196751530645
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