Delete row ('268', '20081') from daily_volatility

ticker_id 268
day 20081
implied_open 0.4079748521661599
implied_high 0.4222619092459087
implied_low 0.3809881887933011
implied_close 0.3809881887933011
historical_open 0.6841912890413031
historical_high 0.6841912890413031
historical_low 0.6841912890413031
historical_close 0.6841912890413031
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