Delete row ('2519', '20713') from daily_volatility

ticker_id 2519
day 20713
implied_open 0.4206744584592699
implied_high 0.439723867898935
implied_low 0.3778132872200236
implied_close 0.4159121060993537
historical_open 0.3952752458730499
historical_high 0.3952752458730499
historical_low 0.3952752458730499
historical_close 0.3952752458730499
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