Delete row ('2661', '20180') from daily_volatility

ticker_id 2661
day 20180
implied_open 0.6429175685886955
implied_high 0.6683167811749156
implied_low 0.627043060722308
implied_close 0.627043060722308
historical_open 0.8080124503991261
historical_high 0.8080124503991261
historical_low 0.8080124503991261
historical_close 0.8080124503991261
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