Delete row ('2661', '20311') from daily_volatility

ticker_id 2661
day 20311
implied_open 0.4809975883515426
implied_high 0.5000469977912076
implied_low 0.4809975883515426
implied_close 0.4905222930713751
historical_open 0.5127466040843177
historical_high 0.5127466040843177
historical_low 0.5127466040843177
historical_close 0.5127466040843177
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