Delete row ('2756', '20509') from daily_volatility

ticker_id 2756
day 20509
implied_open 0.2174807577695094
implied_high 0.2428799703557294
implied_low 0.2174807577695094
implied_close 0.2222431101294256
historical_open 0.187319192823373
historical_high 0.187319192823373
historical_low 0.187319192823373
historical_close 0.187319192823373
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