Delete row ('2770', '20507') from daily_volatility

ticker_id 2770
day 20507
implied_open 0.3000281986747246
implied_high 0.3159027065411121
implied_low 0.3000281986747246
implied_close 0.3095529033945571
historical_open 0.2555795766488395
historical_high 0.2555795766488395
historical_low 0.2555795766488395
historical_close 0.2555795766488395
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