Delete row ('862', '20718') from daily_volatility

ticker_id 862
day 20718
implied_open 1.004856347942332
implied_high 1.128677509300154
implied_low 0.9842194877160277
implied_close 0.9905692908625827
historical_open 0.9429457672634202
historical_high 0.9429457672634202
historical_low 0.9429457672634202
historical_close 0.9429457672634202
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