Delete row ('1670', '20647') from daily_volatility

ticker_id 1670
day 20647
implied_open 0.8683355802913987
implied_high 0.8937347928776188
implied_low 0.8683355802913987
implied_close 0.8873849897310637
historical_open 0.9715198814229177
historical_high 0.9715198814229177
historical_low 0.9715198814229177
historical_close 0.9715198814229177
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