Delete row ('2808', '20735') from daily_volatility

ticker_id 2808
day 20735
implied_open 0.355588976207081
implied_high 0.355588976207081
implied_low 0.3032031002480021
implied_close 0.3159027065411121
historical_open 0.2158933069828706
historical_high 0.2158933069828706
historical_low 0.2158933069828706
historical_close 0.2158933069828706
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