Delete row ('615', '20069') from daily_volatility

ticker_id 615
day 20069
implied_open 0.2397050687824519
implied_high 0.252404675075562
implied_low 0.2397050687824519
implied_close 0.2460548719290069
historical_open 0.2000187991164831
historical_high 0.2000187991164831
historical_low 0.2000187991164831
historical_close 0.2000187991164831
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