Delete row ('2519', '20406') from daily_volatility

ticker_id 2519
day 20406
implied_open 0.542908169030454
implied_high 0.5730697339765903
implied_low 0.5111591532976789
implied_close 0.5111591532976789
historical_open 0.5190964072308727
historical_high 0.5190964072308727
historical_low 0.5190964072308727
historical_close 0.5190964072308727
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