Delete row ('6', '20340') from daily_volatility

ticker_id 6
day 20340
implied_open 0.87944773579787
implied_high 0.8969096944508963
implied_low 0.873097932651315
implied_close 0.87944773579787
historical_open 1.057242223901411
historical_high 1.057242223901411
historical_low 1.057242223901411
historical_close 1.057242223901411
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