Delete row ('2770', '20615') from daily_volatility

ticker_id 2770
day 20615
implied_open 0.3286023128342221
implied_high 0.3301897636208609
implied_low 0.3063780018212796
implied_close 0.3063780018212796
historical_open 0.2952658463148083
historical_high 0.2952658463148083
historical_low 0.2952658463148083
historical_close 0.2952658463148083
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