Delete row ('550', '20731') from daily_volatility

ticker_id 550
day 20731
implied_open 0.3095529033945571
implied_high 0.4127372045260762
implied_low 0.3095529033945571
implied_close 0.3111403541811958
historical_open 0.2270054624893419
historical_high 0.2270054624893419
historical_low 0.2270054624893419
historical_close 0.2270054624893419
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