Delete row ('2756', '20440') from daily_volatility

ticker_id 2756
day 20440
implied_open 0.1587450786638754
implied_high 0.168269783383708
implied_low 0.1365207676509329
implied_close 0.1508078247306817
historical_open 0.1412831200108491
historical_high 0.1412831200108491
historical_low 0.1412831200108491
historical_close 0.1412831200108491
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