Delete row ('1928', '20735') from daily_volatility

ticker_id 1928
day 20735
implied_open 1.012793601875525
implied_high 1.012793601875525
implied_low 0.6699042319615544
implied_close 0.9397708656901427
historical_open 0.8540485232116499
historical_high 0.8540485232116499
historical_low 0.8540485232116499
historical_close 0.8540485232116499
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