Delete row ('510', '20301') from daily_volatility

ticker_id 510
day 20301
implied_open 0.5048093501511239
implied_high 0.6127560036425592
implied_low 0.4952846454312914
implied_close 0.5317960135239828
historical_open 0.4047999505928824
historical_high 0.4047999505928824
historical_low 0.4047999505928824
historical_close 0.4047999505928824
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