Delete row ('2334', '20151') from daily_volatility

ticker_id 2334
day 20151
implied_open 0.3905128935131336
implied_high 0.4222619092459087
implied_low 0.3635262301402747
implied_close 0.3809881887933011
historical_open 0.3365395667674159
historical_high 0.3365395667674159
historical_low 0.3365395667674159
historical_close 0.3365395667674159
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