Delete row ('268', '20614') from daily_volatility

ticker_id 268
day 20614
implied_open 0.4794101375649039
implied_high 0.4968720962179302
implied_low 0.4778226867782651
implied_close 0.4889348422847364
historical_open 0.7032406984809682
historical_high 0.7032406984809682
historical_low 0.7032406984809682
historical_close 0.7032406984809682
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