Delete row ('4', '20664') from daily_volatility

ticker_id 4
day 20664
implied_open 0.4905222930713751
implied_high 0.5206838580175115
implied_low 0.4778226867782651
implied_close 0.4873473914980976
historical_open 0.5159215056575952
historical_high 0.5159215056575952
historical_low 0.5159215056575952
historical_close 0.5159215056575952
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