Delete row ('2143', '20712') from daily_volatility

ticker_id 2143
day 20712
implied_open 0.5762446355498678
implied_high 0.6095811020692816
implied_low 0.4746477852049876
implied_close 0.5698948324033128
historical_open 0.4381364171122962
historical_high 0.4381364171122962
historical_low 0.4381364171122962
historical_close 0.4381364171122962
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