Delete row ('193', '20257') from daily_volatility

ticker_id 193
day 20257
implied_open 0.601643848136088
implied_high 0.633392863868863
implied_low 0.5159215056575952
implied_close 0.5397332674571765
historical_open 0.6921285429744969
historical_high 0.6921285429744969
historical_low 0.6921285429744969
historical_close 0.6921285429744969
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