Delete row ('2509', '20735') from daily_volatility

ticker_id 2509
day 20735
implied_open 0.5651324800433966
implied_high 0.5651324800433966
implied_low 0.3841630903665786
implied_close 0.3921003442997724
historical_open 0.2635168305820332
historical_high 0.2635168305820332
historical_low 0.2635168305820332
historical_close 0.2635168305820332
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