Delete row ('404', '20700') from daily_volatility

ticker_id 404
day 20700
implied_open 0.1365207676509329
implied_high 0.1365207676509329
implied_low 0.1301709645043779
implied_close 0.1301709645043779
historical_open 0.1555701770905979
historical_high 0.1555701770905979
historical_low 0.1555701770905979
historical_close 0.1555701770905979
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