Delete row ('2770', '20509') from daily_volatility

ticker_id 2770
day 20509
implied_open 0.3047905510346408
implied_high 0.3079654526079184
implied_low 0.2920909447415308
implied_close 0.3063780018212796
historical_open 0.2571670274354782
historical_high 0.2571670274354782
historical_low 0.2571670274354782
historical_close 0.2571670274354782
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