Delete row ('2770', '20181') from daily_volatility

ticker_id 2770
day 20181
implied_open 0.2111309546229543
implied_high 0.2873285923816146
implied_low 0.2111309546229543
implied_close 0.2873285923816146
historical_open 0.2603419290087557
historical_high 0.2603419290087557
historical_low 0.2603419290087557
historical_close 0.2603419290087557
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