Delete row ('2770', '20138') from daily_volatility

ticker_id 2770
day 20138
implied_open 0.2095435038363156
implied_high 0.2111309546229543
implied_low 0.1936689959699281
implied_close 0.1984313483298443
historical_open 0.2270054624893419
historical_high 0.2270054624893419
historical_low 0.2270054624893419
historical_close 0.2270054624893419
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