Delete row ('28', '20735') from daily_volatility

ticker_id 28
day 20735
implied_open 0.4619481789118776
implied_high 0.4619481789118776
implied_low 0.4000375982329661
implied_close 0.4413113186855737
historical_open 0.2190682085561481
historical_high 0.2190682085561481
historical_low 0.2190682085561481
historical_close 0.2190682085561481
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