Delete row ('2762', '20511') from daily_volatility

ticker_id 2762
day 20511
implied_open 0.161919980237153
implied_high 0.168269783383708
implied_low 0.1571576278772367
implied_close 0.1635074310237917
historical_open 0.1428705707974879
historical_high 0.1428705707974879
historical_low 0.1428705707974879
historical_close 0.1428705707974879
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